(A) Maximum magnetic flux
(B) Rate of change of magnetic flux
(C) Change in magnetic flux
(D) Internal magnetic flux
Tag: Physics Mcq
If the motor is overloaded , then the magnitude of “Back emf”:
(A) Increases
(B) Decreases
(C) Remains constant
(D) Becomes zero
The induced emf in a motor which opposes the external emf running the motor is called:
(A) Induced emf of a motor
(B) Back emf of a motor
(C) emf
(D) Forward emf of battery
Slip rings are used in:
(A) A.C. Dynmo
(B) D.C. Dynmo
(C) Rectifier
(D) Electric Motor
The relation for emf induced in an A.C. generator can be expressed by:
(A) ε = εo cos (ωt)
(B) ε = εo sin (ωt)
(C) ε = εo tan (ωt)
(D) ε = εo / sin (ωt)
Energy stored per unit volume inside the solenoid is called:
(A) Energy density
(B) Charge density
(C) Mass density
(D) Volume charge density
The relation for emf induced in an A.C. generator can be expressed by:
(A) ε = εo cos (ωt)
(B) ε = εo sin (ωt)
(C) ε = εo tan (ωt)
(D) ε = εo / sin (ωt)
The work is stored in in the inductor as:
(A) Elastic potential energy
(B) Kinetic energy
(C) Potential energy
(D) Gravitation potential energy