EE SHORT NOTES AC FUNDAMENTALS 3
41

The voltage of domestic supply is 220 V. This figure represents
r.m.s. value [other wrong options are – Mean value, Peak value, Average value, ] 
42

The shunt element of prototype high pass filter is
Inductive [other wrong options are – Resistive, Capacitive, Combination of L and C, ] 
43

Which of the following statement is incorrect ?
Current source is a passive element [other wrong options are – Resistance is a passive element, Voltage source is an active element, Conductance is a passive element, ] 
EE SHORT NOTES AC FUNDAMENTALS 3
44

In a series resonant circuit, the impedance of the circuit is
Minimum [other wrong options are – Maximum, Zero, Infinite, ] 
45

Ohm is the unit of all of the following except
Capacitance [other wrong options are – Inductive reactance, Capacitive reactance, Resistance, ] 
46

Skin effect occurs when a conductor carries current at____ frequencies.
High [other wrong options are – Very low, Low, Medium, ] 
47

The time constant of a series RC circuit is given by
RC [other wrong options are – R/C, RC2, R2C, ] 
48

The double energy transient occur in the
RLC circuit [other wrong options are – Purely inductive circuit, RL circuit, RC circuit, ] 
EE SHORT NOTES AC FUNDAMENTALS 3
49

In a series resonant circuit, the impedance of the circuit is
Minimum [other wrong options are – Maximum, Zero, None of the above, ] 
50

Form factor for a sine wave is
1.11 [other wrong options are – 1.414, 0.707, 0.637, ] 
51

The r.m.s. value of a sine wave is 100A. Its peak value is
70.7 A [other wrong options are – 141.4A, 150A, 282.8 A, ] 
52

The power factor of incandescent bulb is
Unity [other wrong options are – 0.8 lagging, 0.8 leading, Zero, ] 
EE SHORT NOTES AC FUNDAMENTALS 3
53

The shunt element in a band pass filter is
Parallel combination of L and C [other wrong options are – Capacitive, Inductive, Series combination of L and C, ] 
54

The ratio of the bandwidth to the resonance frequency is called the____ of the circuit.
Selectivity [other wrong options are – Impedance, Susceptance, Quality factor, ] 
55

In A.C. circuit the power curve is a sine wave having
Double the frequency of voltage [other wrong options are – Same frequency as that of voltage, Half the frequency of the voltage, None of these, ] 
EE SHORT NOTES AC FUNDAMENTALS 3
56

The r.m.s. value of pure cosine function is
0.707 of peak value [other wrong options are – 0.5 of peak value, Same as peak value, Zero, ] 
57

At very low frequencies a series RC circuit behaves as almost purely____
Capacitive [other wrong options are – Resistive, Inductive, None of these, ] 
58

In a RLC series circuit if voltage V across the circuit is reduced to half the current I will change to
I/2 [other wrong options are – 2 I, 3/4 I, 5/8 I, ] 
59

In the R – L – C containing R = 4.5ω L = 0.06 H,C = 0.6 µF the power factor will be
Leading [other wrong options are – Zero, Lagging, Unity, ] 
EE SHORT NOTES AC FUNDAMENTALS 3
60

Capacitive reactance is more when
Capacitance’sis less and frequency of supply is less [other wrong options are – Capacitance is less and frequency of supply is more, Capacitance is more and frequency of supply is less, Capacitance is more and frequency of supply is more, ] 
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