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Physics Quiz | 25 Important Questions and Answers | Science GK Quiz | Competitive Exam Preparation
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- Опубликовано: 23 окт 2020
- In this video, 25 important questions from Physics are included.
Which one of the following is a vector quantity?
What type of energy is stored in the spring of a watch?
The working of a rocket is based on which Newton's law of motion?
What is the rotational analogue of mass in linear motion?
What is the minimum escape velocity of a rocket to be launched from Earth to space?
What is Young's modulus of a perfectly rigid body?
The value of acceleration due to gravity at the equator will ______ when the Earth stops rotating.
Which of the following is a good conductor of electricity?
What is the principle of Fibre optical communication?
What is the frequency of direct current?
"Curie" is a unit of?
What is the unit of relative density?
Which of the below waves cannot be polarised?
What is the fourth state of matter?
Which is the force that causes objects to float?
Which of the below is used to locate submerged objects?
Which device is used for converting alternating current (AC) to direct current (DC)?
Which of the below is a measure of sound level?
Acceleration is inversely proportional to?
What is the principle behind hydraulic brakes used in automobiles?
Sound cannot travel through?
How does the heat from the Sun reach Earth?
What is it called when the Sun is exactly over the Earth's equator?
The surface tension of a liquid decreases when its temperature is?
Which of the below is a non-renewable energy source?
25/25 bro very easy. Always thankful for this channel ❤
Chup Jhute,jhut bol raha hai sala
newton's third law states that every action has an equal and an opposite reaction
relative density is density of substance / density of water and we get to see that density of water is nothing but the formula of density is mass / volume so density of substance also = mass / volume we get to see that everything gets cancelled and thus it has no unit unlike the normal density which has unit as kgm^3
obviously we know 3 forms of matter exist which are solids liquids and gases and if there is something correct as the fourth state of matter it could only be plasma .
buoyancy obviously cuz we know that force buoyant = density * volume * gravity which is 9.8 m/s or 10m/s .
in pascal's law i think so it states that if a pressure s put on one part of the object it also is same in the other end
obviously we know that sound cannot travel in vaccum
pressure is increased with depth
Okay
yeah this is interesting
fun fact : how to find whether a quantity is a scalar or a vector
a vector * vector = a vector quantity
a scalar * scalar = scalar quantitiy
a vector* scalar = vector
we can see that force formula is mass * acceleration so we can basically see that using basics we know that acceleration is a vector quantity so it is basically a vector quantity
Except Work it is a product of two vector quantities
@@bholanathsaha1161 cuz it's a scalar product
No dude there exist dot product as well vector*vector= scalar like in kinetic energy velocity squared is a dot product there
Sonar
I have got 11 points, Thanks for your acknowledge
But very important physic questions sir
Most welcome 😁
One thing is the propulsion of rocket is based on second law of motion where it states that if f is proportional to momentum then if u differentiate f wrt t then u get f = vdm/dt + mdv/dt mass of fuel is not constant in expulsion of rocket then f= vdm/dt and hence rocket propulsion is based on 2nd law of motion
First
It was very useful in IGKO Exam, I am from Airson English School in Badlapur, INDIA 👍👍👍👍👍
Plasma
Third
17/25 is correct
Radar
I got 22/25 Tq so much 👍👍
Thanks for giving us these knowledge❤
Infinitty
I surely recommend you to add like this vedios #really helpful 👍😊
So nice of you 😁😁
suprlyy teached yarr u are the great person yarr
Iam studying in 8 th standard I got 21/25
Who gives u a phone😀😃😃
Good u got 21 /25
I am also 8 th but i got 24/25 🎉🎉
It is bcuz I am topper
@@bharathgaming592 go and say to ur mom and take a 🍫🍫🍫
So what
2:33
Centrifugal force may stop applying, but the part of the force due to gravity doesn't change.
My weight doesn't change when I am carried by an elevator, since my mass stays the same, acceleration caused by gravity doesn't change when other forces apply, only the net force does.
Your weight does change in an elevator, mass and weight aren't the same thing
The apparent weight in a lift is vectorial sum of of ma and mg where a is acceleration due to lift and g is earth's gravitational field
Also due to earth's rotation the centrifugal force in non inertial rotational frame causes our weight to decrease slightly
this apparent change is due to change in value of g, where
g(apparent)=g-Rw²cos(y)
where g=9.8m/s², R=radius of earth, w= angular speed of earth and y=latitude
since y at equator=0, cos(y)=1 and g(apparent)=g-Rw²
when the earth stops rotating w becomes zero and g(apparent)=g which is greater than g-Rw², therefore the value of g increases and so does the weight, which can simply be defined as product of mass×g in accordance with newton's laws
Force
yah its amazing questions yar this youtube channel is very useful to us ra
18
B
Thanku sir awesome class😊
Equinox
yeah yarr nice yarr well done ra
Radio
Water
Vaccum
D
"Bequeral" is the unit of radioactivity.
Curie is not the unit.
Both units are valid
There are si and cgs units
Curie is also a unit of radioactivity
2-d
Solar
Graphite
24/25. I didn't know that acc'n due to gravity would change if the Earth stopped rotating.
Convection
25/25 marks lgot it l studiying 8std GHSS puzhathi
I've got 18 points. It's amazing
Radiation
Refraction
I got all correct
Excellent 👏
@@LNT 😎
3
I have got 20/25
Decreased
20/25 is correct
Vacuum is correct
24/25 correct,😃
😮
I got all of it
Liar
15/25
60uz
22 out of 25
1:20
2:35
Tadioactivity
I also got 17/25.
Tq sir
My score 19/25🙂
12
Rectifier
Kg m2
Thanks to you sir 👍❤❤❤
Good video
18/25 - I able to answer correctly!!!
Super 👏👏👏
25/25 🎉🎉❤❤ 9th class
Increase
No unit
25/25
Excellent 👏👏👏
I got 22 out of 25
16 correct
Newton law
Very nice Sir......
Thank you 😁😁
23
9.8km/s
It's very simple question 😂
I got 22 correctly
Awesome 👏👏👏
@@LNT thanks 🇮🇳
17/25 correct
I got 17 I am in 6th standard
Paper
Please play in live also
2: potential energy because stored energy in the spring
Thanks sir
Ths qstn was asked in recent nata phase 2 ppr
elastic potential energy
If the spring is extended then released then kinetic energy will also be indulged hence this question needs more clarity either being a resting spring or extended spring
I can’t believe I’m watching this for entertainment
Please dont read the answer a, b, c, d it feel bore,just read the right answer.
I got 22 correct.😊
MY ALL ANSWER ARE CORRECT
13/25
24/25 is correct
😯
21/25
Very good 👏👏👏
11.2 mm.s
20/25 7th grade
Buoyancy
Bupcancy
Mass
19/25
Decibel
I study this questions in 5th class
Infinity
A
Sound
A force
Ke