Numerical Problem No. 14.4 (Current Electricity) Physics SSC - II (Class 10)

By applying a potential difference of 10 V across a conductor a current of 1.5 A passes through it. How much energy would be obtained from the current in 2 minutes? Ans.(1800 J)

Data Given:

Potential Difference (Voltage) = V = 10 V

Current = I = 1.5 A

Time = t = 2 min = 2 ｘ 60 sec = 120 sec

To Find:

Energy = W = ? 

Solution:

We have the formula

W = I²R t

or

W = I(IR) t

W = IVt   (∴ V=IR)

by putting value

W = 1.5 A ｘ 10 V ｘ 120 s

W = 1800 J ----------------Ans.

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