Question

A current of 4 mA flows for 5 min
through a circuit for which 80 J of work is done. Find the potential difference

Answer 1

The potential difference of the circuit is 66.67 V.

Given,

Current (I) = 4mA = 0.004 A

Time (t) = 5 min = 300 sec

Work done (W) = 80 J

To Find,

The potential difference.

Solution,

The formula for calculating the charge is

Q = It

Now, the total charge that flows in 300 sec is

Q = I × t = 0.004 × 300 = 1.2 C

Now, using the formula for work done, we will calculate the potential difference

W = V × Q

where, v is the potential difference, and q is the charge.

V = W/Q = 80/1.2 = 66.67 volts

Hence, the potential difference is 66.67 Volts.

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Answer 2

Answer:

66.67

Explanation:

firstly Q=it and then V=W/Q