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) An inductive load always has a ........... power factor
A) Leading
B) Lagging
C) Zero
D) Unity
Ans:B
2) When resistance are connected in parallel, the total resistance is
A) Less than the smallest resistance in the connection
B) Greater than the smallest resistance in the connection
C) Between the smallest and greatest resistance in the connection
D) Increasing and decreasing depending upon the supply voltage
Ans:A
3) The arc across a switch when it open an RL circuit is a result of the
A) Large self induced voltage across L
B) Long time constant
C) Low resistance of the open switch
D) Surge of resistance
Ans:A
4) What is a rotating vector whose projection can represent either current or voltage in an ac circuit?
A) Polar diagram
B) Scalar quantity
C) Velocity
D) Phasor
Ans:D
5) Which factor does not affect resistance?
A) Length
B) Resistivity
C) Cross-sectional area
D) Mass
Ans:D
6) Which of the following capacitors are used only in dc circuits?
A) Mica
B) Ceramic
C) Mylar
D) Electrolytic
And:D
7) The maximum power transfer theorem is used in
A) Power system
B) Electronic system
C) Refrigeration
D) Air conditioning
Ans:B
8) In Norton’s theorem, the short circuit current is obtained by
A) Opening the load terminals
B) Shorting the load terminals
C) Opening the voltage source
D) Shorting the voltage source
Ans:B
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1) An inductive load always has a ........... power factor
A) Leading
B) Lagging
C) Zero
D) Unity
Ans:B
2) When resistance are connected in parallel, the total resistance is
A) Less than the smallest resistance in the connection
B) Greater than the smallest resistance in the connection
C) Between the smallest and greatest resistance in the connection
D) Increasing and decreasing depending upon the supply voltage
Ans:A
3) The arc across a switch when it open an RL circuit is a result of the
A) Large self induced voltage across L
B) Long time constant
C) Low resistance of the open switch
D) Surge of resistance
Ans:A
4) What is a rotating vector whose projection can represent either current or voltage in an ac circuit?
A) Polar diagram
B) Scalar quantity
C) Velocity
D) Phasor
Ans:D
5) Which factor does not affect resistance?
A) Length
B) Resistivity
C) Cross-sectional area
D) Mass
Ans:D
6) Which of the following capacitors are used only in dc circuits?
A) Mica
B) Ceramic
C) Mylar
D) Electrolytic
And:D
7) The maximum power transfer theorem is used in
A) Power system
B) Electronic system
C) Refrigeration
D) Air conditioning
Ans:B
8) In Norton’s theorem, the short circuit current is obtained by
A) Opening the load terminals
B) Shorting the load terminals
C) Opening the voltage source
D) Shorting the voltage source
Ans:B
9) For maximum power transfer, what is the relation between load resistance RL and internal resistance R of the voltage source?
A) RL = 2 r
B) RL= 1.5 r
C) RL = r
D) RL = 3 r
Ans:C
D) RL = 3 r
Ans:C
10) A capacitor of 0.5 uF charged to 220 V is connected across an uncharged 0.5 uF capacitor. What is the voltage across each capacitor?
A) 220 V
B) 150 V
C) 110 V
C) 110 V
D) 22 V
Ans:C
Ans:C
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