A. transformer
B. motor
C. D.C generator
D. A.C generator
Related Mcqs:
- The electric charge of 100 °C is 13cm apart from another charge 16.9°C electric force between them is_____________?
A. 9x107N
B. 900N
C. 9x105N
D. 9x106N - Which one of the following devices does not function like an electric motor ?
A. Galvanometer
B. Ammeter
C. Voltmeter
D. Transformer - Which of the following is an advantage of electric traction over other methods of traction ?
A. Faster acceleration
B. No pollution problems
C. Better braking action
D. All of the above - Which of the following is the advantage of electric braking ?
A. It avoids wear of track
B. Motor continues to remain loaded during braking
C. It is instantaneous
D. More heat is generated during braking - Which of the following is the disadvantage of electric traction over other systems of traction ?
A. Corrosion problems in the under-ground pipe work
B. Short time power failure interrupts traffic for hours
C. High capital outlay in fixed installations beside route limitation
D. Interference with communication lines
C. All of the above - The selection of an electric motor for any application depends on which of the following factors ?
A. Electrical characteristics
B. Mechanical characteristics
C. Size and rating of motors
D. Cost
E. All of the above - For a particular application the type of electric-and control gear are determined by which of the following considerations ?
A. Starting torque
B. Conditions of environment
C. Limitation on starting current
D. Speed control range and its nature
E. All of the above - The diameter of the rotor shaft for an electric motor depends on which of the following ?
A. r.p.m. only
B. Horse power only
C. Horse power and r.p.m.
D. Horse power, r.p.m. and power factor - Which one of the following can be taken as the measure of electric intensity ?
A. F/A
B. V/A
C. VF/A
D. q/VA - An electric current induced within the body of a conductor when that conductor either moves through a non uniform magnetic field or in a region where there is a change in magnetic flux is called_____________?
A. Induced current
B. Eddy current
C. Back emf
D. None of the above
