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This mock test of Test: AC Generator for JEE helps you for every JEE entrance exam.
This contains 5 Multiple Choice Questions for JEE Test: AC Generator (mcq) to study with solutions a complete question bank.
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QUESTION: 1

The factor, on which the frequency of an AC generator depends,

Solution:

The answer provided in the forum is wrong, the correct answer would be option B and D both.

Solution:

Frequency of a.c, ν=w/2π, where w is the speed of rotation

Also, frequency is defined as the number of rotations that a coil rotates in one second.

QUESTION: 2

AC generator produces

Solution:

Generator is a device that converts mechanical energy to electrical energy for use in an external circuit.

QUESTION: 3

Which of the following is used to determine the direction of induced current in a generator?

Solution:

Fleming's Right hand rule: Hold a current-carrying conductor in your right hand with thumb in the direction of the current, the direction of the field lines will be the direction of your fingers.

QUESTION: 4

Efficiency of electric motor is always less than

Solution:

Electric motors have an efficiency of less than 100% because there is ALWAYS energy loss through any mechanism imaginable.

QUESTION: 5

Induced e.m.f is given by it will be maximum when ,

Solution:

The rate of change of flux linkage is directly proportional to the induced EMF in a coil. Hence, the EMF is maximum when the rate of change of flux linkage is maximum.

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