Instantaneous power in inductor is proportional to the

Related Mcqs:

1. Power dissipation in ideal inductor is

   A. Maximum
   B. Minimum
   C. Zero
   D. A finite value

2. The voltage induced in an inductor is represented as,

   A. product of its inductance and current through it.
   B. ratio of its inductance to the current through it.
   C. ratio of the current through it to its inductance.
   D. product of its inductance and rate of change of current through it.

3. Inductor does not allow the sudden change of

   A. current
   B. voltage
   C. power
   D. None of the above

4. What will be the collector efficiency of a power amplifier having zero signal power dissipation of 5 watts and a.c. power output of 2 watts ?

   A. 20%
   B. 80%
   C. 40%
   D. 50%

5. The maximum a.c. power output from a class A power amplifier is 10 W. What should be the minimum power rating of the transistor used ?

   A. 10 W
   B. 15 W
   C. 5 W
   D. 20 W

6. The output power of a transistor amplifier is more than the input power because the additional power is supplied by__________________?

   A. Transistor
   B. Biasing circuit
   C. Collector supply VCC
   D. None of the above

7.  If P is the power of a star connected system then what will be power of an equivalent delta connected system?

   A. P
   B. 3P
   C. P/3
   D. None of the above

   Updated by: muhammad rahim

8. For the same a.c. power output as above, what should be the minimum power rating of transistor for class B operation?

   A. 10 W
   B. 4 W
   C. 8 W
   D. None of the above

9. The class B push-pull circuit can deliver 100 W of a.c. output power. What should be the minimum power rating of each transistor ?

   A. 20 W
   B. 40 W
   C. 10 W
   D. 80 W

10. The power output of an audio system is 18 W. For a person to notice an increase in the output (loudness or sound intensity) of the system, what must the output power be increased to ?

    A. 2 W
    B. 6 W
    C. 68 W
    D. None of the above