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# Energy Conversion Principles - Electrical Machines MCQs

Energy Conversion Principles MCQs : Here you will find MCQ Questions related to "Energy Conversion Principles" in Electrical Machines. These Energy Conversion Principles MCQ Questions Will help you to improve your Electrical Machines knowledge and will prepare you for various Examinations like Competitive Exams, Placements, Interviews and other Entrance Exmaniations.

Question 1

Energy can ?

A. neither be created
B. nor be destroyed
C. can be destroyed
D. Both A and B

Question 2

In an energy conversion device, the total input energy is equal to the sum of the following ____________ components.

A. 1
B. 2
C. 3
D. 4

Question 3

Total mechanical energy input equal to?

A. electrical energy output - total energy storage + total energy dissipated
B. electrical energy output + total energy storage + total energy dissipated
C. electrical energy output + total energy storage - total energy dissipated
D. electrical energy output - total energy storage - total energy dissipated

Question 4

An electromechanical energy conversion device is one which converts _______

A. Electrical energy to mechanical energy only
B. Mechanical energy to electrical energy only
C. Both A and B
D. None of the above

Question 5

When a conductor is allowed to move in a magnetic field, a voltage is induced in the conductor

A. TRUE
B. FALSE
C. Can be true and false
D. Can not say

Question 6

A physical system of electromechanical energy conversion, consists of a stationary part creating a magnetic field with electric energy input, and a moving part giving mechanical energy output. If the movable part is kept fixed, the entire electrical energy input will be _______

A. stored in the electric field
B. stored in the magnetic field
C. divided equally between the magnetic and electric fields
D. zero

Question 7

The developed electromagnetic force and/or torque in electromechanical energy conversion system, acts in such a direction that tends to ___________

A. increase the stored energy at constant mmf
B. decrease the co-energy at constant mmf
C. decrease the stored energy at constant mmf
D. increase the stored energy at constant flux

Question 8

The energy storing capacity of magnetic field is about ________ times greater than that of electric field.

A. 10000
B. 15000
C. 20000
D. 25000

Question 9

When a current-carrying conductor is placed in a magnetic field, then a mechanical force is experienced by the conductor.

A. TRUE
B. FALSE
C. Can be true and false
D. Can not say