Question
Question: A coil has 200 turns and area of 70 cm<sup>2</sup>. The magnetic field perpendicular to the plane of...
A coil has 200 turns and area of 70 cm2. The magnetic field perpendicular to the plane of the coil is 0.3 Wb/m2 and take 0.1 sec to rotate through 1800. The value of the induced e.m.f. will be-
A
8.4 V
B
84 V
C
42 V
D
4.2 V
Answer
8.4 V
Explanation
Solution
f1 = NBA cos 0ŗ = NBA
f2 = NBA cos p = – NBA
e = –
= 