## Question

### Solution

Correct option is

0.75 V

The maximum value of the induced emf is given by Where N is the number of turns in the coil, B is the magnetic field, A is the area of the coil and the angular velocity of the coil.

Here

N = 100, B = 0.003 Wb m–2A = 0.20 × 0.10 = 0.02 mand rpm . #### SIMILAR QUESTIONS

Q1

The instantaneous current in a circuit is given by I = 2cos (u4t + Ï•) ampere. The r.m.s value of the current is

Q2

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Q3

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Q4

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Q5

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Q6

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Q7

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Q8

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Q9

An a.c. generator consists of a coil of 50 turns and area 2.5 m2 rotating at an angular speed of 60 rad s–1 in a uniform magnetic field of 0.30 T. The resistance of the circuit including that of the coil is 500 . Find the maximum current drawn from the generator.

Q10

In a dynamo, a coil of area 0.2 m2 and having 100 turns rotates in a magnetic field of 0.1 Wb m–2 with an angular velocity of 100 rad s–1. The output terminals are connected through a resistance of . Calculate the torque , as a function of time t, required to keep the coil rotating.