Question

The electric potential at two ends of a conductor is 4V and 2V respectively. 10J of work needs to be done to ove certain amount of charge from end at higher potential to end at lower potential. Find the amount of charge flowing between the two ends.

• A. 2C
• B. 3C
• C. 20C
• D. 5coulomb

Answer 1

The correct option is D 5coulomb

Potential difference between two ends of conductor (V) = 4V-2V=2V
$V=2V$
Work done = 10J
Charge (Q) = ?
Potential difference $=\frac{work}{charge}$
$V=\frac{W}{Q}=\frac{10J}{2V}=5$coulomb