01. A sine wave has a frequency of 50 Hz. Its angular frequency is _______radian/second.

**100 Ï€**

50 Ï€

25 Ï€

5 Ï€

02. The form factor is the ratio of

Peak value to r.m.s. value

**r.m.s. value to average value**

Average value to r.m.s. value

None of the above

03. A heater is rated as 230 V, 10 kW, A.C. The value 230 V refers to

Average voltage

**R.M.S voltage**

Peak voltage

None of the above

04. The voltage of domestic supply is 230V. This figure represents

1 point

Mean value

**R.M.S value**

Peak value

Average value

05. Two waves of the same frequency have opposite phase when the phase angle between them is

360°

**180°**

90°

0°

06. The r.m.s. value and the Average value is the same in the case of

Triangular wave

Sine wave

**Square wave**

Half-wave rectified sine wave

07. Form factor for a sine wave is

1.414

0.707

**1.11**

0.637

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

0.5 s

**0.005 s**

0.00005 s

5 s

09. In a series resonant circuit, the impedance of the circuit is

**Minimum**

Maximum

Zero

None of the above

10. Which of the following circuit component opposes the change in the circuit voltage?

Inductance

**Capacitance**

Conductance

Resistance

11. The best place to install a capacitor is

Very near to inductive load

**Across the terminals of the inductive load**

Far away from the inductive load

Any where

12. Capacitors for power factor correction are rated in

kW

kVA

kV

**kVAR**

13. All the rules and laws of D.C. circuit also apply to A.C. circuit containing

Capacitance only

Inductance only

**Resistance only**

All above

14. Power factor of the following circuit will be unity

inductance

Capacitance

**Resistance**

Both 1 and 2

15. Power factor of the following circuit will be zero

Resistance

Inductance

Capacitance

**Both 2 and 3**