Q 2. A conductor is rotating within a magnetic field then at which position do the peak voltage occurs ? Ans- F= B.L.V.sin90 Option (a.) is right answer.
Very Nice Krishna I hope you have clearly understood the concept I have replied many of viewers on the same questions. The same question is where so many people make mistakes.
Plz correct some Qn ans Qn 4 Ans:- B Qn 14 Ans:-a (Commutator is a mechanical rectifier by the virtue of it's rotation) BTW Sir you are doing well so keep on...
Thank you for appreciation Pankaj, The answer which was explained is correct. It Convert DC to AC only in case of DC motor. Kindly crosscheck. once again let me explain it to you, commutator is used for the conversion of ac to dc and also from dc to ac, in case of dc motor's it is used to convert DC applied voltage into ac (changes polarity due to which current direction changes also polarity of pole changes with current direction) SO basically Question is about DC MOTOR and not DC Generator. Whatever you're saying is correct if it was a DC Generator but question is about Motor so we feed DC in rotor which converted into AC to have rotating action.
www.google.com/search?q=commutator+of+dc+motor+convert+ac+to+dc+or+dc+to+ac&oq=commutator+of+dc+motor+convert+ac+to+dc+or+dc+to+ac&aqs=chrome..69i57.30639j1j7&client=ms-android-samsung-gj-rev1&sourceid=chrome-mobile&ie=UTF-8 Check it out bro..
all questions ka good, keep it up sir or ye comments me jo kamiya nikal rahe he answers me unko abhi dc machine ka D bhi pta nahi he or aapko wrong bata rahe he all questions and answers are right and thank you sir for this video ,❤️
The direction of rotation of a DC series motor can be reversed A. By changing supply terminal B. By interchange field terminal C. Either by interchange supply terminal or by interchange field terminal D. By interchange supply terminal as well as field terminal Please ans this question sir. JB Gupta me option B diya hai n made easy ke ESE book me option C diya hai.
Hlo sir i m from Himachal Or sir hmara september month m hp linemen ka exam h sir to kindly request h apse uske related kuch question waali video bnaye
Sir I have problem with qution no 1 As per qution working principle of dc motor is electromegnetic induction But here given answer FLR and as we all know FLR is used to determine of induced emf magnetic flux and direction of currunt so ? Pls explain
No ,, flemings left hand rule is used to determine direction of rotation Or simply we can say FLR is for DC motor & fleming's right hand rule for DC generator
Indeed, I have already explained this in the comment section. The answer which was explained is correct. It Convert DC to AC only in case of DC motor. Kindly crosscheck. once again let me explain it to you, commutator is used for the conversion of ac to dc and also from dc to ac, in case of dc motor's it is used to convert DC applied voltage into ac (changes polarity due to which current direction changes also polarity of pole changes with current direction) SO basically Question is about DC MOTOR and not DC Generator. Whatever you're saying is correct if it was a DC Generator but question is about Motor so we feed DC in rotor which converted into AC to have rotating action.
Herein question is related to DC Motor so the answer is correct i,e it converts DC to AC. Kindly go through the following explanation, On the fixed part of the motor, there are two brushes that carry the current. One is positive and the other is negative. These brushes carry direct current. The current always flows the same direction through these brushes. That’s the DC part of your question. These brushes press again the rotating part. Where they are touching the rotating part, there are many contacts around the circle. As the rotating part rotates, different contacts touch the brushes. That lets current flow through different parts of the rotating part from one brush through the rotating part and out to the other brush. Half a turn later, the two contacts that were touching the brushes one way will now be touching the brushes the other way. Current will flow through the rotating part in the opposite direction that it was flowing half a rotation early. The current in that part inside the rotating part keeps changing direction every half turn. So inside the rotating part, it’s seeing alternating current even though the brushes are providing direct current.
The answer which was explained is correct. It Convert DC to AC only in case of DC motor. Kindly crosscheck. once again let me explain it to you, commutator is used for the conversion of ac to dc and also from dc to ac, in case of dc motor's it is used to convert DC applied voltage into ac (changes polarity due to which current direction changes also polarity of pole changes with current direction) SO basically Question is about DC MOTOR and not DC Generator.
I apologize Mr. Radhakrishnan for the same I am currently working for technical syllabus only, in the near future if possible I will try to implement the same. Till then you go thoroughly with technical videos. Thank you.
It is strongly recommended that a channel author do not share copies of books without prior permission and copyrights of the original publisher. I regret your query but as an author, I have to keep up and follow community guidelines for the authenticity of the channel. I will post important MCQs from the same book in upcoming sessions so stay tuned and do share.
@@nitinwandile6122 I'm so glad that you understood this Nitin. There are so many comments I have replied asking me about this correction without looking into the actual answer.
commutator converts both ac to dc and dc to ac, but in the case of the motor we supply dc and hence commutator converts dc to ac, and in the case of the generator ac to dc.
@@bhaisahab538 In DC Generator the commutator converts from AC induced current produced in the armature windings is converted to DC and gives to the external load connected. On the Other hand, in case of DC Motor when the supply was given is DC it is converted from DC to AC and provided to the armature windings so that in order to produce the rotational torque.
The answer which was explained is correct. It Convert DC to AC only in case of DC motor. Kindly crosscheck. once again let me explain it to you, commutator is used for the conversion of ac to dc and also from dc to ac, in case of dc motor's it is used to convert DC applied voltage into ac (changes polarity due to which current direction changes also polarity of pole changes with current direction) SO basically Question is about DC MOTOR and not DC Generator. Kindly read the question properly.
The answer which was explained is correct. It Convert DC to AC only in case of DC motor. Kindly crosscheck. once again let me explain it to you, commutator is used for the conversion of ac to dc and also from dc to ac, in case of dc motor's it is used to convert DC applied voltage into ac (changes polarity due to which current direction changes also polarity of pole changes with current direction) SO basically Question is about DC MOTOR and not DC Generator. Kindly read the question properly.
@Vikas Yadav Correct Vikas, but here we are talking about the DC Motor. If the question could have been asked about DC Generator then it holds true that it converts AC to Unidirectional. I hope you understood the same. Stay tuned and DO share.
The explained answer is correct with my references kindly DO crosscheck again Sharad. The lap winding used for high current, low voltage machines. and The applications of wave winding include low current and high voltage machines.
Q 2. A conductor is rotating within a magnetic field then at which position do the peak voltage occurs ?
Ans- F= B.L.V.sin90
Option (a.) is right answer.
Sb kuch sahi h but...
F=blvcosΦ hota hai... Along the axis...
Cos0°=1 that mean maximum when conductor will be along the axis
Commutator of "DC generator" converts AC to DC
Commutator of "DC motor" converts DC to AC
Many of the viewers are getting confuse between this
Very Nice Krishna I hope you have clearly understood the concept I have replied many of viewers on the same questions. The same question is where so many people make mistakes.
2nd ka answer hoga..
Along the axis bcz F=blvcosΦ = cos0=1
Along the axis 0° ..so it will be maximum
Awesome sir 😊 plz make more videos
Blvsin
Sir please provide Questions on
1) parts of vehicles
2) manufacturing planning and control
3) recent trends in automobile
4) Transmission
Superb explained sir plz update more lecture related electrical
Thank you Hardik, there are a number of lectures uploaded on the channel kindly do watch and share. Stay tuned for more sessions.
N number @@ElectricalEngineeringMCQs zu
Thanks 🌹🌹sir
Plz correct some Qn ans
Qn 4
Ans:- B
Qn 14
Ans:-a (Commutator is a mechanical rectifier by the virtue of it's rotation)
BTW Sir you are doing well so keep on...
Thank you for appreciation Pankaj, The answer which was explained is correct. It Convert DC to AC only in case of DC motor. Kindly crosscheck. once again let me explain it to you,
commutator is used for the conversion of ac to dc and also from dc to ac, in case of dc motor's it is used to convert DC applied voltage into ac (changes polarity due to which current direction changes also polarity of pole changes with current direction)
SO basically Question is about DC MOTOR and not DC Generator.
Whatever you're saying is correct if it was a DC Generator but question is about Motor so we feed DC in rotor which converted into AC to have rotating action.
www.google.com/search?q=commutator+of+dc+motor+convert+ac+to+dc+or+dc+to+ac&oq=commutator+of+dc+motor+convert+ac+to+dc+or+dc+to+ac&aqs=chrome..69i57.30639j1j7&client=ms-android-samsung-gj-rev1&sourceid=chrome-mobile&ie=UTF-8
Check it out bro..
wave winding are used for low current but high voltag.low current to low curren posibility
Good sir
excellance explanation
Thank you Hafiz, Kindly Share with your friends.
Sir plc par video banaaiye
👍👍👍 best video boht help full tha keep it up 👍
Glad to hear that, Kindly DO Share this session with your friends.
all questions ka good, keep it up sir
or ye comments me jo kamiya nikal rahe he answers me
unko abhi dc machine ka D bhi pta nahi he
or aapko wrong bata rahe he
all questions and answers are right
and thank you sir for this video ,❤️
Thank you so much Tousif for your kind feedback.
The direction of rotation of a DC series motor can be reversed
A. By changing supply terminal
B. By interchange field terminal
C. Either by interchange supply terminal or by interchange field terminal
D. By interchange supply terminal as well as field terminal
Please ans this question sir. JB Gupta me option B diya hai n made easy ke ESE book me option C diya hai.
Option c is right ans
Thanks so much sir
armature winding placed on rotor for commutation
great sir
Thank you kindly DO Share this session with your friends.
Skewing are provided for reduces vibration
Armature of Dc machine is laminated to reduce eddy current losses
No.15 ..commutator Ac to DC convert using
Function of commutator is convert AC to DC
In dc motor dc to ac n in generator ac to dc
Discussing about dc machines
Stray losses is combination of iron and mechanical losses
Sir Commutator work in generator as a Mechanical rectifier & In motor work as a Mechanical Inverter.
Pole shoe are laminated to reduce eddy current shoe me edi hota hai
Commutattor toh ac to dc krta hai na sir.. that's why it is also called mechanical rectifier
Thank you sir for uploading sir this type of questions can ask KPTCL exame please help me sir
Q2 ans C
Sir give more questions of electrical & electronics for Bmc junior engg..
Sure. Mr. Vishal Comment down other than videos I have posted, on which particular topic you want video on. I will surely add the same.
@@ElectricalEngineeringMCQs OK sir
Q 3 ans c is also right sir
Thanks
1:37
Teeth in motor are provided for torque
Commutator is a mechanical rectifier ,,,,it converts AC into Dc
Armature of dc motor are made up of silicon steel because silicon steel has least hysteresis loss
Hlo sir i m from Himachal Or sir hmara september month m hp linemen ka exam h sir to kindly request h apse uske related kuch question waali video bnaye
👍👍👍
Sir please provide video on Batteries , UPS and DG sets
Sure Suraj. I'm planning to upload a collective video on small topics which has left to upload. Stay tuned and DO share.
Sir
I have problem with qution no 1
As per qution working principle of dc motor is electromegnetic induction
But here given answer FLR and as we all know FLR is used to determine of induced emf magnetic flux and direction of currunt so ?
Pls explain
No ,, flemings left hand rule is used to determine direction of rotation
Or simply we can say FLR is for DC motor
& fleming's right hand rule for DC generator
1.37
Armature of dc current has eddy current loss
if x = t², y =t³ then d²y / dx² =
Sir plzz solve this question..
Commutator converts AC to DC
The function of commutator is convert AC to DC.
Please give right information to the student......
Indeed, I have already explained this in the comment section. The answer which was explained is correct. It Convert DC to AC only in case of DC motor. Kindly crosscheck. once again let me explain it to you,
commutator is used for the conversion of ac to dc and also from dc to ac, in case of dc motor's it is used to convert DC applied voltage into ac (changes polarity due to which current direction changes also polarity of pole changes with current direction)
SO basically Question is about DC MOTOR and not DC Generator.
Whatever you're saying is correct if it was a DC Generator but question is about Motor so we feed DC in rotor which converted into AC to have rotating action.
Commutator convert AC to DC
Commutator concerts ac to dc
Herein question is related to DC Motor so the answer is correct i,e it converts DC to AC. Kindly go through the following explanation,
On the fixed part of the motor, there are two brushes that carry the current. One is positive and the other is negative. These brushes carry direct current. The current always flows the same direction through these brushes. That’s the DC part of your question.
These brushes press again the rotating part. Where they are touching the rotating part, there are many contacts around the circle. As the rotating part rotates, different contacts touch the brushes. That lets current flow through different parts of the rotating part from one brush through the rotating part and out to the other brush. Half a turn later, the two contacts that were touching the brushes one way will now be touching the brushes the other way. Current will flow through the rotating part in the opposite direction that it was flowing half a rotation early. The current in that part inside the rotating part keeps changing direction every half turn. So inside the rotating part, it’s seeing alternating current even though the brushes are providing direct current.
Yoke is not laminated.
And Q15. Ans: a not b
14th question answer wrong..
Commutator converts AC to dc
In DC motor, commutator converts DC to AC...reverse action possible. But used only in DC machines
In dc generator commutator converts ac to dc
Question no 3
Your answer is B
According to your answer option C is also correct
ques. 14 ka answer a) AC to DC
Dc shunt motor has constant flux motora
Jai Shree Ram 👍
Poles of dc machine have pulsasion loss
Motor the characteristics video nessery upload ji
commutator and commutation are same ?
Commutator is the part of the DC machine and the process of converting DC to AC or vice versa by using commutator called commutation process
Question no 2 ka ans Galt hai maximum voltage occurred at along the axix
14. Commutator convert AC to DC
Not DC to AC
The answer which was explained is correct. It Convert DC to AC only in case of DC motor. Kindly crosscheck. once again let me explain it to you,
commutator is used for the conversion of ac to dc and also from dc to ac, in case of dc motor's it is used to convert DC applied voltage into ac (changes polarity due to which current direction changes also polarity of pole changes with current direction)
SO basically Question is about DC MOTOR and not DC Generator.
Commutator a.c. to dc 14 q is wrong
Bhai DC GENERATOR converts Dc to ac but DC MOTOR converts ac to pulsating DC.
No machine can produce DC . So a DC machine produce AC and is converted into DC by commutator
Question 2is wrong ans
Ans-option a
sir plz if u possible then upload reasoning question also
I apologize Mr. Radhakrishnan for the same I am currently working for technical syllabus only, in the near future if possible I will try to implement the same. Till then you go thoroughly with technical videos. Thank you.
If you have Pdf of B L thereja book of mcq then plz give it sir
It is strongly recommended that a channel author do not share copies of books without prior permission and copyrights of the original publisher. I regret your query but as an author, I have to keep up and follow community guidelines for the authenticity of the channel.
I will post important MCQs from the same book in upcoming sessions so stay tuned and do share.
@@ElectricalEngineeringMCQs
K sir thanks for reply
I liked your contents.
They are really clearing small small things which we think we know, But we don’t!
Indeed, Ankit that is why I have started this series of questions and sessions. Stay tuned and DO share.
Hello sir aapne Q.2 ka answer miss Kar days.
Q14 is Ac to DC
dc motor bola hai bro
gen me ac to dc rheta
@@nitinwandile6122 I'm so glad that you understood this Nitin. There are so many comments I have replied asking me about this correction without looking into the actual answer.
Machine ki basic all theory ki poori class kagado sir
Sure. Stay tuned and DO share.
No 2 ka answer nahi bataye
Ans 14 me AC to DC hoga
We are talking about DC Motor
@@ElectricalEngineeringMCQs I know
I seen your video for q.2 but you skipped it
Why...?
Plz provide explanation for q.2
Q2 Ans. B. Along the axis of the magnetic field
@@ElectricalEngineeringMCQs no...90 degree of field...coz....blv sinx
Bbaiyio 15 ques right hai kya ??
Q14... Correction Required
Commutator convert Ac To Dc...
commutator converts both ac to dc and dc to ac, but in the case of the motor we supply dc and hence commutator converts dc to ac, and in the case of the generator ac to dc.
14 que ka ans galt bata rhe ho ac to DC aaye ga
Answer is correct kindly crosscheck aman.
Sir armature ko hmesha ac supplr dete hai...usko dc me change krna pdta hai..isliy commuator lgate hai.. proof chaiy to bta dene sir
@@bhaisahab538 In DC Generator the commutator converts from AC induced current produced in the armature windings is converted to DC and gives to the external load connected.
On the Other hand, in case of DC Motor when the supply was given is DC it is converted from DC to AC and provided to the armature windings so that in order to produce the rotational torque.
@@ElectricalEngineeringMCQs yes
Que 2 galat batay ho bhai correct karlo answer A honga
Thank you for your kind correction. I will make sure to correct it in video as well as in PDF. Kindly re-download the PDF shortly.
rate of change toh max tab hoga na jan magnetic field axis k along hoga.....so option b is correct
A., wrong ,b correct h
2nd question ka ans kya h
Q2 Ans. B. Along the axis of the magnetic field. It has been uploaded in the description box too.
Q2 ka ans kya hain?
Q2 Ans. B. Along the axis of the magnetic field
@@ElectricalEngineeringMCQs but u r mention in this video option C 45°
Or thoda explain bhi kia kro
Ha
17 no wrong the answer is 2 way
The answer is correct. Kindly crosscheck.
Dc machine is not in BMC syllabus
Yes. Ravindra I have added this as a conceptual video not specifically for BMC Exam so like mentioned in the title as well.
14 wale questions me gad badi hai
Hai commutator vala question shi krlo ye ac ko dc krta h
The answer which was explained is correct. It Convert DC to AC only in case of DC motor. Kindly crosscheck. once again let me explain it to you,
commutator is used for the conversion of ac to dc and also from dc to ac, in case of dc motor's it is used to convert DC applied voltage into ac (changes polarity due to which current direction changes also polarity of pole changes with current direction)
SO basically Question is about DC MOTOR and not DC Generator. Kindly read the question properly.
@@ElectricalEngineeringMCQs thanks bro, thoda sa explain kia kro answer ko taki bhule na
Sure, and thank you for your valuable feedback Dheeraj Do share and stay tuned.
You r right sir, in case of dc motor the commutator convert DC to Ac
@@OMPRAKASH-hr8fw Indeed, I'm glad you understood it well that there is a difference in DC motor and Generator. Stay tuned and DO share.
Alternator te vi video uploaded kero sir
Ques no. 2ans plzzz anyone ???
Q2 Ans. B. Along the axis of the magnetic field
Are 2nd questions ka answer to batao
Along the axis of Magnetic Field
Your basic concepts are not properly clear
Galat ans hai
Mujhe sirf ek ka ans aata tha 14th ka wohi galt krwa diya apne ......correct ur doubts first then come to youtube
The answer which was explained is correct. It Convert DC to AC only in case of DC motor. Kindly crosscheck. once again let me explain it to you,
commutator is used for the conversion of ac to dc and also from dc to ac, in case of dc motor's it is used to convert DC applied voltage into ac (changes polarity due to which current direction changes also polarity of pole changes with current direction)
SO basically Question is about DC MOTOR and not DC Generator. Kindly read the question properly.
Ok thanks
@Vikas Yadav Correct Vikas, but here we are talking about the DC Motor. If the question could have been asked about DC Generator then it holds true that it converts AC to Unidirectional. I hope you understood the same. Stay tuned and DO share.
@@thecatalyst2623 bahut jankar lagte ho bhai. Dhang se b puch sakte ho doubt
3rd qustion formula is wrong
360° mechanical = 360° ✕ P/2 electrical
P = number of poles
1° mechanical = (P/2)° electrical.
DO crosscheck with your reference whatever I have explained is correct.
16 galat bataya h apne lap winding me low voltage high current k liye use hota h wave high voltage low current k liye
The explained answer is correct with my references kindly DO crosscheck again Sharad.
The lap winding used for high current, low voltage machines. and The applications of wave winding include low current and high voltage machines.
Thank you sir