Question
Question: A coil has 1000 turns and 500 cm<sup>2</sup> as its area. The plane of the coil is placed at right a...
A coil has 1000 turns and 500 cm2 as its area. The plane of the coil is placed at right angle to a magnetic induction field of 2 × 10–5 web/m2. The coil is rotated through 1800 in 0.2 seconds. The average e.m.f. induced in the coil in milli volts is –
A
5
B
10
C
15
D
20
Answer
5
Explanation
Solution
f1 = BA cos 00 = BA, f2 = BA cos 1800 = –BA
\ Df = f2 – f1 = – 2BA, \ e = –N 