Question 326: Electromagnetic Induction

Question

A 800 turn coil of effective area 0.05 m
2
is kept.  perpendicular to a magnetic filed 5 × 10
–5
T. When the plane of the coil is rotated by 90
o
around any of its coplanar axis in 0.1 s, the emf induced in the coil will be :

Accepted Answer

Given
N = 800, A = 0.05 m
2
, B = 5 ÃÂ 10
Ã¢ÂÂ5
T
$$\Delta $$t = 0.15 s
We know, e = $$ - {{\left( {{\phi _f} - {\phi _i}} ight)} \over {\Delta t}}$$
= $$ - {{\left( {0 - NBA} ight)} \over {\Delta t}}$$
= $${{800 	imes 5 	imes {{10}^{ - 5}} 	imes 5 	imes {{10}^{ - 2}}} \over {0.1}}$$
= 0.02 V

Answer

0.2 V

Answer

0.02 V

Answer

2 V

Answer

2 $$ 	imes $$ 10
-3
V

Electromagnetic Induction

A 800 turn coil of effective area 0.05 m 2 is kept. perpendicular to a magnetic filed 5 × 10 –5 T. When the plane of the coil is rotated by 90 o around any of its coplanar axis in 0.1 s, the emf induced in the coil will be :

Choose the correct answer: