V=IR then,R=V/I.if we change the value of I and V is there any affect on R

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Solution

R=V/I
Where R is the resistance of the conductor. Resistance is a property of wire(conductor), that depends on type of material and shape of the wire. For any given wire, resistance remains constant at given temperature. The resistance (R) of a material depends on its length, cross-sectional area, and the resistivity a number that depends on the material. .
Hence, increasing or decreasing voltage doesn't change resistance.

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Q. Which among the following is correct, where I = current, V = Potential difference & R = Resistance?

V=IR, from this equation it's clear that V is directly proportional to I and R..
I=V/R, from this equation it's clear that I is directly proportional to V and inversely proportional to R.
But when V is directly proportional to R and I is directly proportional to V then why is I not directly proportional to R?

The potential difference across a cell of emf E and internal resistance r is

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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