1. The quality factor of R-L-C circuit will increase if ?

R increases

R decreases

impedance increases

voltage increases

Answer: R decreases

Explanation:


2. The ratio of active power to apparent power is known as ...... factor ?

demand

load

power

form

Answer: power

Explanation:


3. For a frequency of 200 Hz, the time period will be ?

0.05 s

0.005 s

0.0005 s

0.5 s

Answer: 0.005 s

Explanation:


4. In a parallel R-C circuit, the current always ...... the applied voltage ?

lags

leads

remains in phase with

none of the above

Answer: leads

Explanation:


5. Power factor of the following circuit will be zero ?

resistance

inductance

capacitance

both (b) and (c)

Answer: both (b) and (c)

Explanation:


6. The r.m.s. value of a sinusoidal A.C. current is equal to its value at an angle of ...... degrees ?

90

60

45

30

Answer: 45

Explanation:


7. The frequency of an alternating current is ?

the speed with which the alternator runs

the number of cycles generated in one minute

the number of waves passing through a point in one second

the number of electrons passing through a point in one second

Answer: the number of waves passing through a point in one second

Explanation:


8. Form Factor is the ratio of ?

average value / r.m.s. value

average value / peak value

r.m.s, value / average value

r.m.s. value / peak value

Answer: r.m.s, value / average value

Explanation:


9. Power factor of the following circuit will be unity ?

inductance

capacitance

resistance

both (a) and (b)

Answer: resistance

Explanation:


10. For 200 V r.m.s, value-triangular wave, the peak voltage will be ?

200 V

222 V

282 V

346 V

Answer: 346 V

Explanation: