Question

Calculate the amount of work done to draw a current of 8A from a point at 100V to a point at 120V in 2 seconds

Answer 1

320J

Explanation:

Final Potential - Initial potential  =  work done/charge

charge=current * time

V=120-100=20

work done=20*16=320J

Answer 2

The amount of work done is 320 J.

Explanation:

The relationship between potential difference and work done is given as

 $W=\Delta Vq$

Here, $\Delta V$ is the change in potential difference and q is the charge.

As charge is given as

q = it

Here i the current and t is the time.

So relation becomes,

$W=\Delta Vit$

Given i = 8 A, t = 2 s  and $\Delta V=120V-100V=20 V$.

substitute the given values, we get

$W=20V\times8A\times2s$

W = 320 J.

Thus, the amount of work done is 320 J.

#Learn More: potential difference, work done.

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