Related Questions
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4
What is the other name of relative permittivity?
D. Specific inductance capacity
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4
Which waveform in which the rms value and the mean value are equal?
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4
Two capacitors of capacitance 9 F and 18 F in series will have a total capacitance of
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4
A trimmer is a variable capacitor in which capacitance is varied by changing the
C. Distance between plates
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4
Which of the following combination of length and cross-sectional area will give a certain volume of copper the least resistance?
B. Does not matter because the volume of copper remains the same
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4
In dividing or multiplying phasor quantitiesa ___ form is used.
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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 reading of an ohmmeter for a shorted capacitor?
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4
The distance between the capacitor plates increases two timesa then its capacitance
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4
A coil of inductance L has an inductive reactance of XLin an ac circuit in which the effective current is I. The coil is made from a superconducting material. The rate at which power is dissipated in the coil is
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4
Which one of the following elements serves as a protection against overload?
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A factor that states how much the resistance changes for a change in temperature?
C. Coefficient of temperature change
D. Temperature coefficient of resistance
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4
A real current source has
A. Infinite internal resistance
B. Zero internal resistance
C. Large internal resistance
D. Small internal resistance
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4
If resonant frequency is 10 kHz and quality factor is 50a then
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4
The unit of elastance is
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4
In a rectangular wavea the peak factor is
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4
At what frequency will the current in a series RLCcircuit reach its maximum value for an applied voltage of 15 V with R = 500 a L = 100 H and C= 0.001 F?
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4
If the inductance is decreaseda the impedance of the circuit containing a resistor a capacitor and an inductor connected in series to an ac source
C. Decreases or increases
D. Decreasesa increases or remains the same
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4
An inductor carries 2 A dc. If its inductance is 100 Ha then what is its inductive reactance?
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4
What refers to the lowest voltage across any insulator that can cause current flow?
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4
In a rectangular wavea the form factor is
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4
The mutual inductance between two coils is ___ the reluctance of magnetic path.
A. Directly proportional to
B. Inversely proportional to
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4
A capacitor is used to
D. Short the voltage source
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4
Which of the following is not a factor affecting dielectric strength?
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4
Of the equivalent combination of unitsa which one is not equal to watt?
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Two complex numbers or phasors are said to be conjugate if they
A. Differ only in the algebraic sign of their quadratic components
B. Differ only in the algebraic sign of their real components
C. Are equal in their real and quadrature components including alge
D. Are equal in their real components but differ in their quadrature components i ncluding algebraic signs.
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4
Rationalizing the denominator of a complex number means
A. Eliminating the j component in the denominator
B. Adding j component in the denominator
C. Eliminating the j component in the numerator
D. Adding j component in the numerator
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4
In the 5-band method of capacitor color codinga the first band indicates
A. Temperature coefficient
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4
How many degrees of phase represents one full cycle?
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4
What determines the direction of induced emf in a conductor or coil?
B. Fleming�s left hand rule
C. Ampere�s circuital law
D. Fleming�s right hand rule