A.C can not be used for_______________?

Related Mcqs:

1. A.C cannot be used for_______________?

   A. producing heat
   B. producing light
   C. magnetizing and electroplating
   D. all the above

2. Inductors acts as a short circuit for_______________?

   A. AC
   B. DC
   C. Both A and B
   D. none of these

3. cmf generated by A.C dynamo depends upon_____________?

   A. number of turns in the coil
   B. magnetic field strength
   C. frequency of rotation
   D. all of above

4. 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

5. A.C cannot be used for________________?

   A. producing heat
   B. producing light
   C. magnetizing and electroplating
   D. all the above

6. The emf induced in a coil by a changing magnetic flux may have unit as______________?

   A. ms-1A
   B. ms-2A-1
   C. kgms2A-1
   D. kgm2s-1A-1

7. Transformer works on the principle of________________?

   A. Lenzs law
   B. Faradays law
   C. Mutual induction
   D. Law of conservation of power

8. Non inductive resistances are used in decreasing______________?

   A. Mutual inductance
   B. Self inductance
   C. Magnetic fields
   D. Heating effect

9. For electroplating we use_________________?

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

10. Energy stored in a magnetic field is given by______________?

    A. LI2
    B. L2I/2
    C. LI2/2
    D. IL2