Question

Rectangular coil of 300 times has an average area of 25 cm into 10 cm the coil rotates with a speed of 50 cps in

Answer 1

Answer:Answer: (c) 30π

Explanation:

Given data

Number of turns of coil = 300 = n

area = 25 cm × 10 cm. =A

speed of coil = 50 cps =w

magnetic field strength 4 × 10^-2 T = B

B is about an axis perpendicular of the field

Therefore θ= 90°

sin90=1

To find: The peak value of the induced e.m.f.

We know that

E = nBA ω sin θ

= (300)*(4*10^-2)*(25*10^-2) *(10*10^-2)*2π*50 *1

= 30πvolts

Hence peak value of induced emf = 30π volts

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Explanation: