Hi friends, these are some of the multiple choice questions on electrical circuits. These are some of the basic questions which are asked in previous competitive papers check out and comment...
1) Two capacitors of capacitance 9 pl: and 18 uF in series will have a total capacitance of
A) 27 µF
B) 162 µF
C) 6 µF
D) 180 µF
Ans:C
2) In a series RLC circuit
A) Increasing the frequency decreases the resistance
B) Increasing the frequency increases the resistance
C) Both XL and XC change as frequency changes
D) Impedance will always decrease
Ans:C
3) A series RLC circuit has a power factor at its half-power points
A) Unity
B) Leading
C) Lagging
D) Either B or C
Ans:D
4) Kirchhoffs laws (KCL and KVL) are applicable to
A) DC circuits
B) AC circuits
C) DC as well as AC circuits
D) Passive networks alone
Ans:C
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1) Two capacitors of capacitance 9 pl: and 18 uF in series will have a total capacitance of
A) 27 µF
B) 162 µF
C) 6 µF
D) 180 µF
Ans:C
2) In a series RLC circuit
A) Increasing the frequency decreases the resistance
B) Increasing the frequency increases the resistance
C) Both XL and XC change as frequency changes
D) Impedance will always decrease
Ans:C
3) A series RLC circuit has a power factor at its half-power points
A) Unity
B) Leading
C) Lagging
D) Either B or C
Ans:D
4) Kirchhoffs laws (KCL and KVL) are applicable to
A) DC circuits
B) AC circuits
C) DC as well as AC circuits
D) Passive networks alone
Ans:C
5) A tank circuit is a
A) Parallel LC circuit
B) Series LC circuit
C) A resonant circuit
D) A non-resonant circuit
Ans:A
6) A capacitive load always has a ................ power factor
A) Leading
B) Lagging
C) Zero
D) Unity
Ans:A
7) What is the temperature coefficient of the resistance Eureka?
A) Infinity
B) Negative
C) Almost Zero
D) Positive
Ans:C
8) As applied to a series RLC circuit, bandwidth means
A) The frequency range for maximum power transfer
B) The difference between the highest and lowest frequencies of the oscillator
C) The separation of half-power points
D) The frequency at which XL = XC
Ans:C
9) Which is considered as the effect of a dielectric material?
A) Increasing capacitance
B) Decreasing capacitance
C) Reducing the working voltage
D) Increasing the distance between the plates
Ans:A
10) The open-circuit voltage at the terminal of load RL is 60V. Under the condition of maximum power transfer, the load voltage will be
A) 60 V
B) 15 V
C) 20 V
D) 30 V
Ans:D
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