Electrical Engineering · Question Bank

circuits

301 questions · page 8 of 16. Answer in your head first, then check the solution.

📘 EE Mock Board Exam
#141
Which of the following does not generally affect the value of a capacitor?
Athe dielectric material used
Bthe surface are of the plates
Cthe thickness of the dielectric
Dthe voltage applied to the plate
#142
What is the purpose of a load in an electric circuit?
Ato increase the circuit current
Bto decrease the circuit current
Cto utilize the electrical energy
Dto make the circuit complete
#143
The power factor of a certain circuit in which the voltage lags behind the current is 80%. To increase the power to 100%, it is necessary to add _____ to the circuit.
Ainductance
Bcapacitance
Cresistance
Dimpedance
#144
Refers to the outward-curving distortion of the lines of force near the edges of two parallel metal plates that form a capacitor.
Askin effect
Bnight effect
Cedge effect
Dhall effect
#145
What does a capacitor store?
Avoltage
Bcharge
Ccurrent
Dpower
#146
The mutual inductance between two coils is _____ the reluctance of magnetic path.
Adirectly proportional to
Binversely proportional to
Cindependent of
Dequal to
#147
The result of rust in electrical (wire) connection is
Ainductance
Bconductance
Cimpedance
Dresistance
#148
Which of the following is a disadvantage of wire-wound resistors?
Ait has reactance in radio-frequency circuits
Bit cannot handle much power
Cit draws a large amount of current
Dit cannot handle high voltage
#149
The resistance of an insulator _____ when its temperature is increased
Adecreases
Bremains the same
Cincreases
Dvaries
#150
The wavelength of an alternating waveform depends upon the _____ of the variation.
Aperiod
Bnumber
Cfrequency
Damplitude
#151
Delta to wye or wye to delta transformation technique is applied to a _____ network.
Aone-terminal
Btwo-terminal
Cthree-terminal
Dcomplex
#152
Inductance reactance applies only to sine waves because it
Aincreases with lower frequencies
Bincreases with lower inductance
Cdepends on the factor 2pi
Ddecreases with higher frequencies
#153
_____ increases the resistance of wire at high frequencies.
Atemperature
Bvoltage
Cskin effect
Dinsulation
#154
An inductor carries 2 A dc. If its inductance is 100 μH, then what is its inductive reactance?
Azero
B1.3 kohm(s)
C628 ohm(s)
D-629 ohm(s)
#155
Barium-strontium titanite dielectric material is also called
Aceramic
Bpolyester
Celectrolytic
Dbakelite
#156
In the 5-band method of capacitor color coding, the first band indicates
Atemperature coefficient
Btolerance
C1st digit
Dcapacitance value
#157
What is the most convenient way of achieving large capacitance?
Aby using multiplate construction
Bby using air as dielectric
Cby decreasing distance between plates
Dby using dielectric of low permittivity
#158
A linear circuit is one whose parameters
Achange with change in voltage
Bchange with change in current
Cdo not change with voltage and current
Dchange with change in voltage and current
#159
When two coils of identical reactance are in parallel without mutual inductance, the reactance of the combination is _____ the reactance of each coil.
A1/2
Btwice
Cfour times
D1/4
#160
Which of the following is also known as anti-resonant circuit?
Aparallel resonant circuit
Bseries resonant circuit
Ctuned circuit
Dtank circuit

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