A. A D.C source
B. an A.C source
C. any source
D. all of the above
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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...
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