Question

As a result of change in the magnetic flux linked to the closed loop shown in the figure, an emf V volt is induced in the loop. The work done (joules) in taking a charge Q coulomb once along the loop is:

• A. QV
• B. zero
• C. 2QV
• D. $\frac{QV}{2}$

Answer 1

Answer: (A)

QV

Answer 2

Work required to take a charge equals Q Volt induced in the loop equals V
The amount of work required to move a test charge Q and a loop with an induced emf E is QE.
Due to the non-conservative nature of the generated electric field caused by the change in magnetic field.
Work completed as a result of change will become W=QV.
Consequently, QV is the labour (in joules) involved in taking a charge once along the loop.

Therefore, the correct option is (A): QV