What does emf stand for ?
A. Electromagnetic force
B. Electromated force
C. Electronic magnetic force
D. Electromotive force
Electromagnetic Induction
Electromagnetic Induction Mcqs
What is emf ?
A. Voltage
B. Flux
C. Force
D. Current
An E.M.F. can be induced by ____.
A. Change in the area of cross section only
B. Change in angle between magnetic field and area only
C. Change in the magnetic field, area or angle between them
D. Change in the magnetic field only
The total number of magnetic field lines passing through an area is termed as ?
A. Magnetic flux
B. Magnetic flux density
C. Voltage
D. EMF
What is the consequence of motor effect ?
A. Voltage
B. EMF
C. Current
D. Electromagnetic induction
What happens to the current in a coil while accelerating a magnet inside it ?
A. Reverses
B. Increases
C. Decreases
D. Remains constant
Identify the law used to find the direction of eddy currents.
A. Ampere’s law
B. Faraday’s law
C. Maxwell’s law
D. Lenz’s law
Which of the following is found using Lenz’s law ?
A. The direction of induced emf
B. The direction of alternating current
C. Induced emf
D. Induced current
How can electromagnetic damping be increased ?
A. Increase the temperature of the coil
B. Winding the coil on the aluminum frame
C. Increasing the magnetic density
D. Reduce viscosity
Identify the law which is used to find out the direction of eddy currents.
A. Ampere circuital law
B. Maxwell’s law
C. Lenz’s law
D. Faraday’s law