61

Form factor is the ratio of
r.m.s. value/average value [other wrong options are – Average value/r.m.s. value, Average value/peak value, r.m.s. value/peak value, ] 
62

The peak value of a sine wave is 200 V. Its
average value is 127.4V [other wrong options are – 141.4V, 282.8V, 200 V, ] 
63

The reflection coefficient of the simplest
standing wave is 1 [other wrong options are – +1, Zero, Infinity, ] 
64

A parallel resonant circuit can be used
Both (A) and (B) [other wrong options are – As a high impedance, To reject a small band of frequencies, To amplify certain frequencies, ] 
65

In an A.C. circuit I sin Φ is called
Wattless component [other wrong options are – Active component, Any of the above, None of these, ] 
66

The negative maximum of a cosine wave occurs at
180 [other wrong options are – 30, 45, 90, ] 
67

In a parallel RC circuit, the current always
____the applied voltage. Leads [other wrong options are – Lags, Remains in phase with, None of the above, ] 
68

Power factor of electric bulb is
Unity [other wrong options are – Zero, Lagging, Leading, ] 
69

Power factor of the following circuit will be
unity Resistance [other wrong options are – Inductance, Capacitance, Both (A) and (B), ] 
70

The r.m.s. value of a sinusoidal A.C. current is
equal to its value at an angle of____ degrees 45 [other wrong options are – 90, 60, 30, ] 
71

For a sine wave with peak value Imax
the r.m.s. value is 0.707 Imax [other wrong options are – 0.5 Imax, 0.9 Imax, 1.414 Imax, ] 
72

A heater is rated as 230 V, 10 KW, AC. The value
230 V refers t r.m.s. voltage [other wrong options are – Average voltage, Peak voltage, None of these, ] 
73

The form factor of D.C. supply voltage is always
Unity [other wrong options are – Zero, 0.5, Infinite, ] 
74

The dual of a link is
Tree branch [other wrong options are – Twig, Node, Loop, ] 
75

The power factor of a series RLC circuit at its
halfpower points is Lagging or leading [other wrong options are – Unity, Lagging, Leading, ] 
76

What inductance will give the same reactance as a
capacitor of 2 µF when both are at 50 Hz? 5 H [other wrong options are – 10 H, 15 H, 20 H, ] 
77

The frequency of domestic power supply in India
is 50 Hz [other wrong options are – 200 Hz, 100 Hz, 60 Hz, ] 
78

In an A.C. circuit power is dissipated in
Resistance only [other wrong options are – Inductance only, Capacitance only, None of the above, ] 
79

In a purely inductive circuit
Actual power is zero [other wrong options are – Reactive power is zero, Apparent power is zero, None of these, ] 
80

Power factor of the following circuit will be
zero Both (B) and (C) [other wrong options are – Resistance, Inductance, Capacitance, ] 