Test: AC Generator


5 Questions MCQ Test Physics Class 12 | Test: AC Generator


Description
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. The solved questions answers in this Test: AC Generator quiz give you a good mix of easy questions and tough questions. JEE students definitely take this Test: AC Generator exercise for a better result in the exam. You can find other Test: AC Generator extra questions, long questions & short questions for JEE on EduRev as well by searching above.
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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