Question

(i) If both the potential difference and resistance in a circuit are doubled then the current will change or not. State your answer a​

Answer 1

the current is directly proportional to the voltage and inversely proportional to the resistance. any alteration in the voltage will result in the same alteration of the current. so doubling and tripling of the voltage will cause the current to be doubled or tripled

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Answer 2

Answer: As from Ohm's Law,

V = IR..1

Now, here V is constant.

Let , new resistance R' = 2R and assume that current flow be I'

So, from 1,

IR = I'.R',

-> IR = I'.2R,

Therefore, I' = I / 2

So the current is halved.