Terms, Definitions, MCQs and Free Templates
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The superposition theorem is applicable to
In a pure capacitive circuit if the supply frequency is reduced to 1/2, the current will
The relation between the apparent power, actual power and reactive power is given by
The units for electric dipole moment are
The time constant of the capacitance circuit is defined as the time during which voltage
In a loss-free R-L-C circuit the transient current is
In a series R-L-C circuit at the resonant frequency the
The time constant of a series R-C circuit is given by
If resistance is 20 Ω and inductance is 2 H in a R-L series circuit, then time constant of this will be
At very low frequencies a series R-C circuit behaves as almost purely __________ .
The voltage in a circuit follows the law v = 100 sin ωt if the frequency is 25 Hz, how long will it take for the voltage to rise to 50 volts?
Which of the following expressions is true for apparent power in an A.C. circuit?
For 200V r.m.s. value triangular wave, the peak voltage will be
A sine wave of voltage varies from zero to maximum of 200V. How much is the voltage at the instant of 30° of the cycle?
How much r.m.s. current does a 300 W, 200 V bulb take from the 200V, 50 Hz power line?
The phase difference between them is __________ degrees.
The r.m.s. value of a half-wave rectified current is 100 A. Its value for full-wave rectification would be __________ amperes.
Poor power factor
In a highly capacitive circuit the
Power factor of the following circuit will be unity
A capacitor behave to d.c. as
The scale factor for half wave and full wave rectifier is __________ respectively.
In an idealized half wave rectified system the average and r.m.s. values of voltage are __________ respectively.
The value of current at resonance in series R-L-C circuit is affected by the value of
In a R-L-C circuit at resonance is
An electrical network with 8 independent nodes will have __________ nodal equations.
In a circuit containing a complex impedance, maximum power transfer takes place when load is
Form factor for a sine wave is
Which of the following statements is correct?
Which of the following frequencies has the greatest period?
A series resonant circuit is capacitive at f = 150 Hz. The circuit will be inductive somewhere at
As regards dielectric constant εr
In one time constant, the current in a circuit reaches __________ percent of its final value.
Millman’s theorem is the best to find
The series element in band pass filter is
The dual of a loop is
The series element of a band stop filter is
The dual of a link is
The series element for a prototype high pass filter is
If f1 and f2 and half-power frequency and f0 be resonant frequency, the selectivity of R-L-C series circuit is given by