Related Questions
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4
The charge in the capacitor is stored at the
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4
In an inductive coila the rate of rise of current is maximum
A. Near the final maximum value of current
B. At midvalue of current
D. After one time constant
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4
Which of the following does not refer to electrical energy?
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4
For a linear circuita ___ voltage or current is used to calculate average power.
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4
What is considered as the most important value of a sine wave?
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4
Norton�s theorem is what form of an ac equivalent circuit?
C. Both voltage and current
D. Neither voltage nor current
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4
Metal tin becomes superconductor at approximately
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4
Voltage resonance means
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4
The superposition theorem is used when the circuit contains
C. Number of voltage sources
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4
What rating of a resistor determines its ability to absorb heat?
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4
What capacitance exists not through design but simply because two conducting surfaces are relatively close to each other?
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Which of the following has negative temperature coefficient?
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The admittance of a parallel RLC circuit is found to be the ___ sum of conductance and susceptances.
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What refers to the lowest voltage across any insulator that can cause current flow?
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A wire of one kilometre length has a resistance of 20 . If the length is halveda then the new resistance is ___ the original resistance.
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Which waveform in which the rms value and the mean value are equal?
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Two capacitors of capacitance 9 F and 18 F in series will have a total capacitance of
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What is the reciprocal of quality factor?
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The charging of a capacitor through a resistance follows what law?
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4
In Norton�s theorema the short circuit current is obtained by
A. Opening the load terminals
B. Shorting the load terminals
C. Opening the voltage source
D. Shorting the voltage source
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4
If a coil has a Q of 10a it means that
A. The energy stored in the magnetic field of the coil is 10 times the energy wasted in its resistance
B. The energy wasted in its resistance is 10 times the energy stored in the magnetic field of the coil
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4
Norton�s theorem is ____ Thevenin�s theorem.
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Which of the following is the most popular waveform?
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4
The current is ____ times the maximum current at half-power points of a resonance curve.
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4
When two in-phase sine waves that have identical frequency and amplitude are added togethera then the result is a sine wave with ___ the amplitude of either.
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4
What is expected when two 20 k a 1 watt resistor in parallel are use instead of one 10 k a 1 watt?
A. Provides higher current
D. Provides wider tolerance
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4
The reason why electrical appliances are connected in parallel.
A. It is a simple circuit
B. This makes the operation of appliances independent with each other
C. This results in reduced power consumption
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4
In a multiple capacitora the plate area is
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It is impossible to change the voltage across a capacitor instantlya as this would produce ___ current.
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What is the efficiency under the conditions of maximum power transfer?