Question

if current flowing through fixed resistors is halved the heat produced in it will become:- 1) double 2)one half. 3)one fourth. 4)four times

Answer 1

your answer is 1/4 see the attachment for proof

Answer 2

Answer:

The correct answer of this question is option 3 , 1/4th.

Explanation:

According to the Joules law,

We know that,

H= I²RT.

(Here H = Amount of heat , I = Amount of electricity, T = Time)

Now for the first case,

Let,

H1 = (I1)²×R1×T1

Now for the second case,

H2 = (I1/2)² × R1 × T1

H2 = I1²/4 × R1 × T1

4H2 = I1² ×R1 × T1

Now H1 = 4H2

So it is obvious that the produced amount of heat has become 1/4th than the previous.