We know that Ohm Law is V = IR

PROBLEM -

Suppose I take a conducting Rod and let us say that it's one end is A and other is B. Suppose I give a potential difference at A of quantity V and initally my rod resistance is R when the length of rod is L.

What will happen to V and I if I increase the resistance of rod by increasing or decreasing length?

To balance the equation V = I R who will change the value V or I.

MY APPROACH---

What I think is that V can't change since it is a constantly given by source (assumed) so I think value of I will decrease.

This question is borned out of my mind so I also do not know ''Is questions I have uploaded is meaningless?'

Help me in finding correct answer.

In my problem there is no image because I don't think it is necessary and I have assumed a constant temperature.

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Solution

While increasing the resistance by increasing the length then the V must be constant because it is provided by a constant source.to balance the equation the current I will decreases as resistance increases.because Current I is inversely proportional to resistance.

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I

through a rod of a certain metallic oxide is given by

I = 0.2 V^{5 / 2}

, where

V

is the potential difference across it. The rod is connected in series with a resistance to a

6 V

battery of negligible internal resistance. What value (in ohms) should the series resistance have so that the current in the circuit is

0.44

? (round off the value to the nearest integer)

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