Related Questions
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4
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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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
A capacitance of 6 ��F means
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4
An intermittent and non-symmetrical alternating current like that obtained from the secondary winding of an induction coil
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4
Which of the statements below is not true?
A. Current source is an active element
B. Resistor is a linear element
C. Voltage source is a passive element
D. Diode is a non-linear element
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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
What is the purpose of a load in an electric circuit?
A. To increase the circuit current
B. To decrease the circuit current
C. To utilize electrical energy
D. To make the circuit complete
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4
The symbol Q refers to
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It is impossible to change the voltage across a capacitor instantlya as this would produce ___ current.
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4
When two complex conjugates are subtracteda the result is a
A. Quadrature component only
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A 0.09 microfarad capacitor is charged to 220 volts. How long in milliseconds will it discharged resistor has a resistance of 20a000 ohms?
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4
What theorem is usually used in the analysis of transistor circuit?
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4
If a multiplate capacitor has 10 platesa each of area 10 cm2a then
A. 10 capacitors will be in parallel
B. 10 capacitors will be in series
C. 9 capacitors will be in parallel
D. 9 capacitors will be in series
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4
An ac series circuit is composed of a resistance of 20 a inductive reactance of 40 a and a capacitive reactance of 15 . If a current of 1 ampere is flowinga what is the applied voltage
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4
An alloy composed of 84 % coppera 12 % manganese and 4 % nickel.
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Which waveform in which the rms value and the mean value are equal?
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For a linear circuita ___ voltage or current is used to calculate average power.
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4
VL= VCin a series RLCcircuit when
A. The value of the impedance is minimum
B. The power factor is zero
C. The current leads the total voltage by 90�
D. The total voltage is zero
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4
What increases the resistance of wire at high frequencies?
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4
Which of the following does not affect resistance?
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Which of the following does not refer to electrical energy?
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4
The reciprocal of a complex number is
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The hot resistance of an incandescent lamp is about ___ times its cold resistance.
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4
What is the value of a carbon composition resistor with the following color code: Browna whitea orangea red
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4
High resistance values are a consequence of the ___ of the film.
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4
In a series RLCcircuit
A. Increasing the frequency decreases the resistance
B. Increasing the frequency increases the resistance
C. Both XLand XCchange as frequency changes
D. Impedance will always decrease
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4
What is the efficiency under the conditions of maximum power transfer?
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4
According to Gauss theorema flux can be equated to
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4
The farad is not equivalent to which of the following combination of units
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4
Why are inductance and capacitance not relevant in a dc circuit?
A. Because it is a simple circuit
B. Because dc circuits require only resistance as load
C. Because they do not exist in a dc circuit
D. Because frequency of dc is zero