Basic Electrical Engineering (3110005) MCQs

MCQs of DC Circuits

Showing 101 to 110 out of 137 Questions
8 9 10 11 12 13
101.
What is relative permittivity?
(a) Equal to the absolute permittivity
(b) Ratio of actual permittivity to absolute permittivity
(c) Ratio of absolute permittivity to actual permittivity
(d) Equal to the actual permittivity
Answer:

Option (b)

102.
In order to obtain a high value for capacitance, the permittivity of the dielectric medium should be?
(a) Low
(b) High
(c) Zero
(d) Unity
Answer:

Option (b)

103.
What is the unit for relative permittivity?
(a) F/m
(b) Fm
(c) F/m2
(d) No unit
Answer:

Option (d)

104.
A dielectric is basically a ________.
(a) capacitor
(b) conductor
(c) insulator
(d) semiconductor
Answer:

Option (c)

105.
What happens to the potential difference between the plates of a capacitor as the thickness of the dielectric slab increases?
(a) Increases
(b) Decreases
(c) Remains the same
(d) Becomes zero
Answer:

Option (b)

106.
Which of the following depends on charging and discharging rate of a capacitor?
(a) Time constant
(b) Current
(c) Power
(d) Voltage
Answer:

Option (a)

107.
What is the initial current while charging a capacitor?
(a) High
(b) Low
(c) 0
(d) Cannot be determined
Answer:

Option (a)

108.
What is the final current while charging a capacitor?
(a) High
(b) Zero
(c) Infinity
(d) Low
Answer:

Option (b)

109.
When will be capacitors fully charged?
(a) When voltage is zero
(b) When the supply voltage is equal to the capacitor voltage
(c) When voltage is infinity
(d) When capacitor voltage is equal to half the supply voltage
Answer:

Option (b)

110.
What happens to the capacitor when the capacitor voltage is equal to the source voltage?
(a) The charging phase of the capacitor is over
(b) The discharging phase of the capacitor is over
(c) The capacitor is switched off
(d) The capacitor is switched on
Answer:

Option (c)

Showing 101 to 110 out of 137 Questions
8 9 10 11 12 13