Inductors acts as a short circuit for_______________?
(A) AC
(B) DC
(C) Both A and B
(D) none of these
If the coil is wound on an iron core the flux through it will_______________?
(A) decrease
(B) become zero
(C) remain the same
(D) increase
Which of the following works on torque on the current carrying conductor placed in magnetic field ?
(A) galvanometer
(B) ammeter
(C) voltmeter
(D) all of the above
A.C cannot be used for________________?
(A) producing heat
(B) producing light
(C) magnetizing and electroplating
(D) all the above
Which one of the following functions like a motor ?
(A) galvanometer
(B) ammeter
(C) voltmeter
(D) all of above
An alternating current or voltage________________?
(A) fluctuates off and on
(B) varies in magnitude alone
(C) changes its direction again and again
(D) changes its magnitude continuously and reverses its direction of flow after regularly recurring intervals.
emf induced in a circuit according to Faradays law depends on the_____________?
(A) maximum magnetic flux
(B) rate of change of magnetic flux
(C) change in magnetic flux
(D) initial magnetic flux
Weber is the unit of_____________?
(A) Magnetic field intensity
(B) magnetic induction
(C) magnetic flux
(D) self-inductance
A.C cannot be used for_______________?
(A) producing heat
(B) producing light
(C) magnetizing and electroplating
(D) all the above
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