EE SHORT NOTES-A.C. FUNDAMENTALS 4

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 co-efficient 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 R-C 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 R-L-C circuit at its
half-power 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, ]

                              Part 1  Part 2   Part 3  Part 4  Part 5

EE SHORT NOTES-A.C. FUNDAMENTALS 5
QUIZ OF DAY-24/01/2017 GK & CURRENT AFFAIRS

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