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