A.C cannot be used for_______________?

Related Mcqs:

1. Inductors acts as a short circuit for_______________?

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

2. A.C can not be used for_______________?

   A. producing heat
   B. producing light
   C. Magnetizing iron
   D. Producing magnetic field

3. A.C cannot be used for________________?

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

4. In squirrel cage induction motors which of the following methods of starting cannot be used ?

   A. Resistance in rotor circuit
   B. Resistance in stator circuit
   C. Auto-transformer starting
   D. Star-delta starting

5. The minimum charge on any object cannot be less than_______________?

   A. 1.6 x 10-19C
   B. 3.2 x 10-19C
   C. 9.1 x 109C
   D. no definite value exist

6. 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.

7. Which of the following uses electric energy and does not convert it into any other form ?

   A. transformer
   B. motor
   C. D.C generator
   D. A.C generator

8. Long distance transmission is easy for________________?

   A. D.C voltage
   B. A.C voltage
   C. Half A.C voltage
   D. Half D.C voltage

9. Lagging of changes in the magnetization of a substance behind changes in the magnetic field as the magnetic field is varied is known as magnetic_____________?

   A. Retaintivity
   B. Permeability
   C. Flux
   D. Hysteresis

10. Self-inductance of a long solenoid is______________?

    A. μoN2A
    B. μoN2/A
    C. μoN2
    D. BA