EE SHORT NOTES AC FUNDAMENTALS 5

81

The r.m.s. value of a half-wave rectified current is 100 A. Its value for full-wave rectification would be____ amperes.
141.4
[other wrong options are – 200, 200/π, 40/π, ]

82

For the same peak value, which of the following wave has the least mean value ?
Half wave rectified sine wave
[other wrong options are – Triangular wave, Sine wave, Square wave, ]

83

The time period of a sine wave is 1/50 seconds. Its frequency is
50 Hz
[other wrong options are – 20 Hz, 30 Hz, 40 Hz, ]

84

For the same peak value of voltage which wave form will have the least r.m.s. value ?
Triangular wave
[other wrong options are – Sine wave, Square wave, Full wave rectified sine wave, ]

85

The series element of a band stop filter is
Parallel combination of L and C
[other wrong options are – Capacitive, Inductive, Series combination of L and C, ]

86

Selectivities of different resonance circuits are compared in terms of their
Band widths
[other wrong options are – Impedances, Reactances, Frequencies, ]

87

While drawing vector diagram for a series circuit the reference vector is
Current
[other wrong options are – Voltage, Power, Phase angle, ]

88

Which of the following waves has the highest value of peak factor ‘?
Half wave rectifier sine wave
[other wrong options are – Square wave, Sine wave, Triangular wave, ]

89

The ratio of active power to apparent power is known as ____ factor.
Power
[other wrong options are – Demand, Load, Form, ]

90

Which of the following circuit component opposes the change in the circuit voltage
Capacitance
[other wrong options are – Inductance, Conductance, Resistance, ]

91

Power factor of an inductive circuit is usually improved by connecting capacitor to it in
Parallel
[other wrong options are – Series, Either (A) or (B), None, ]

92

For the same peak value which of the following wave will have the highest r.m.s. value ?
Square wave
[other wrong options are – Half wave rectified sine wave, Triangular wave, Sine wave, ]