I must say you are very good in teaching. Thanks a lot. What baffles me is that the results of this practical seems to contradicts the theory that V varies directly as IR R varies directly as L Therefore V varies directly as L, where I remains constant. My question is, why is it that as values of L increases , the values of V decreases?
The potential drop across the wire of a potentiometer is dependent on its length. According to Ohm's law, the potential drop, is directly proportional to the resistance of the wire, which in turn, is dependent on the wire's length.Increasing the length of a potentiometer wire decreases the voltage at any point because the same voltage is spread over a longer distance.
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Thanks Sir
I must say you are very good in teaching. Thanks a lot.
What baffles me is that the results of this practical seems to contradicts the theory that V varies directly as IR
R varies directly as L
Therefore V varies directly as L, where I remains constant.
My question is, why is it that as values of L increases , the values of V decreases?
The potential drop across the wire of a potentiometer is dependent on its length. According to Ohm's law, the potential drop, is directly proportional to the resistance of the wire, which in turn, is dependent on the wire's length.Increasing the length of a potentiometer wire decreases the voltage at any point because the same voltage is spread over a longer distance.
Your instruments seems accurate.
Is the resistance per unit length of the wire 1.2