Basic Electrical Engineering (3110005) MCQs

MCQs of DC Circuits

Showing 111 to 120 out of 137 Questions
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111.
The charging time constant of a circuit consisting of a capacitor is the time taken for the charge in the capacitor to become __________ % of the initial charge.
(a) 33
(b) 63
(c) 37
(d) 36
Answer:

Option (b)

112.
The discharging time constant of a circuit consisting of a capacitor is the time taken for the charge in the capacitor to become __________ % of the initial charge.
(a) 33
(b) 63
(c) 37
(d) 36
Answer:

Option (c)

113.
While discharging, what happens to the current in the capacitive circuit?
(a) Decreases linearly
(b) Increases linearly
(c) Decreases exponentially
(d) Increases exponentially
Answer:

Option (d)

114.
While discharging, what happens to the voltage in the capacitive circuit?
(a) Decreases linearly
(b) Increases linearly
(c) Decreases exponentially
(d) Increases exponentially
Answer:

Option (c)

115.
While charging, what happens to the current in the capacitive circuit?
(a) Decreases linearly
(b) Increases linearly
(c) Decreases exponentially
(d) Increases exponentially
Answer:

Option (c)

116.
While charging, what happens to the voltage in the capacitive circuit?
(a) Decreases linearly
(b) Increases linearly
(c) Decreases exponentially
(d) Increases exponentially
Answer:

Option (d)

117.
At DC, capacitor acts as _________.
(a) open circuit
(b) short circuit
(c) resistor
(d) inductor
Answer:

Option (a)

118.
In an RC series circuit, when the switch is closed and the circuit is complete, what is the response?
(a) Response does not vary with time
(b) Decays with time
(c) Increases with time
(d) First increases, then decrease
Answer:

Option (b)

119.
Work done in charging a capacitor is ____________
(a) QV
(b) 0.5QV
(c) 2QV
(d) QV2
Answer:

Option (b)

120.
The unit for dielectric strength is ____________
(a) V/m2
(b) MV/m2
(c) MV/m
(d) Vm
Answer:

Option (c)

Showing 111 to 120 out of 137 Questions
9 10 11 12 13 14