A. A D.C source
B. an A.C source
C. any source
D. all of the above
Related Mcqs:
- A dynamo converts______________?
A. mechanical energy into electrical energy
B. electrical energy into mechanical energy
C. magnetic energy into mechanical energy
D. magnetic energy into electrical energy - A.C cannot be used for_______________?
A. producing heat
B. producing light
C. magnetizing and electroplating
D. all the above - A.C cannot be used for________________?
A. producing heat
B. producing light
C. magnetizing and electroplating
D. all the above - 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 - The emf induced in a conductor of unit length moving with unit velocity at right angles to a magnetic field is equal to_____________?
A. Magnetic flux density
B. Torque
C. Mutual induction
D. Motional emf - 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 - Transformer works on the principle of________________?
A. Lenzs law
B. Faradays law
C. Mutual induction
D. Law of conservation of power - Which one of the following devices does not function like an electric motor ?
A. Galvanometer
B. Ammeter
C. Voltmeter
D. Transformer - Non inductive resistances are used in decreasing______________?
A. Mutual inductance
B. Self inductance
C. Magnetic fields
D. Heating effect - Energy stored in a magnetic field is given by______________?
A. LI2
B. L2I/2
C. LI2/2
D. IL2
