Basic Electrical Engineering (3110005) MCQs

MCQs of DC Circuits

Showing 81 to 90 out of 137 Questions
6 7 8 9 10 11
81.
A power factor of a circuit can be improved by placing which, among the following, in a circuit?
(a) Inductor
(b) Capacitor
(c) Resistor
(d) Switch
Answer:

Option (b)

82.
When the supply frequency increases, what happens to the capacitive reactance in the circuit?
(a) Increases
(b) Decreases
(c) Remains the same
(d) Becomes zero
Answer:

Option (b)

83.
Capacitors charge and discharge in __________ manner.
(a) Linear
(b) Constant
(c) Square
(d) Exponential
Answer:

Option (d)

84.
Unit of capacitance is___________
(a) Volts
(b) Farad
(c) Henry
(d) Newton
Answer:

Option (b)

85.
Capacitance is directly proportional to__________
(a) Area of cross section between the plates
(b) Distance of separation between the plates
(c) Both area and distance
(d) Neither area nor distance
Answer:

Option (a)

86.
What is the total capacitance when three capacitors, C1, C2 and C3 are connected in parallel?
(a) C1/(C2+C3)
(b) C1+C2+C3
(c) C2/(C1+C3)
(d) 1/C1+1/C2+1/C3
Answer:

Option (b)

87.
When capacitors are connected in parallel, the total capacitance is always __________ the individual capacitance values.
(a) Greater than
(b) Less than
(c) Equal to
(d) Cannot be determined
Answer:

Option (a)

88.
What is the total capacitance when two capacitors C1 and C2 are connected in series?
(a) (C1+C2)/C1C2
(b) 1/C1+1/C2
(c) C1C2/(C1+C2)
(d) C1+C2
Answer:

Option (c)

89.
When capacitors are connected in series, the equivalent capacitance is ___________ each individual capacitance.
(a) Greater than
(b) Less then
(c) Equal to
(d) Insufficient data provided
Answer:

Option (b)

90.
When capacitors are connected in series _______________ Varies
(a) Voltage across each capacitor
(b) Charge
(c) Capacitance
(d) Resistance
Answer:

Option (a)

Showing 81 to 90 out of 137 Questions
6 7 8 9 10 11