Question

A coil having 500 square loops each of side 10 cm is placed normal to a magnetic field which increases at a rate of 1T/s. The induced emf in volt is

• A. 0.1
• B. 0.5
• C. 1
• D. 5

Answer 1

Answer: (D)

5

Answer 2

By using $e = - \frac { N \left( B _ { 2 } - B _ { 1 } \right) A \cos \theta } { \Delta t }$ ; Given θ = 0^o,

N = 500, A = 100 × 10^–4 m², $\frac { B _ { 2 } - B _ { 1 } } { \Delta t } = 1 \frac { T } { \mathrm { sec } }$

∴