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) Why are inductance and capacitance not relevant in a dc circuit?
A) Because it is a simple circuit
B) Because dc circuits require only resistance as load
C) Because they do not exist in a dc circuit
D) Because frequency of dc is zero
Ans:D
2) When capacitors are connected in parallel, the total capacitance is
A) Greater than the largest capacitor
B) Smaller than the largest capacitor
C) Smaller than the smallest capacitor
D) Greater than the smallest capacitor
Ans:A
3) When current and voltage arte in phase in an ac circuit, the is equal to zero.
A) Resistance
B) Reactance
C) Inductance
D) Capacitance
Ans:B
4) Thevenin’s theorem is what form of an equivalent circuit?
A) Current
B) Voltage
C) Both current and voltage
D) Neither current nor voltage
Ans:B
5) Which of the following combination of length and cross-sectional area will give a certain volume of copper the least resistance?
A) 2L and l/2 A
B) Does not matter because the volume of copper remains the same
C) L and A
D) 1/2L and 2 A
Ans:D
6) The ratio between the reactive power and the apparent power of an ac load is called
A) Quality factor
B) Power factor
C) Power ratio
D) Reactive power
Ans:D
7) What is the efficiency under the conditions of maximum power transfer?
A) 50 %
B) 100 %
C) 25 %
D) 75 %
Ans:A
8) The charging of a capacitor through a resistance follows what law?
A) Linear law
B) Hyperbolic law
C) Inverse-square law
D) Exponential law
Ans:D
9) Norton’s theorem is what form of an ac equivalent circuit?
A) Voltage
B) Current
C) Both voltage and current
D) Neither voltage nor current
Ans:B
10) What is the total capacitance of 10 capacitors, each 0f 20 µF in series?
A) 200 µF
B) 2 µF
C) 100 µF
D) 0.5 µF
Ans:B
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1) Why are inductance and capacitance not relevant in a dc circuit?
A) Because it is a simple circuit
B) Because dc circuits require only resistance as load
C) Because they do not exist in a dc circuit
D) Because frequency of dc is zero
Ans:D
2) When capacitors are connected in parallel, the total capacitance is
A) Greater than the largest capacitor
B) Smaller than the largest capacitor
C) Smaller than the smallest capacitor
D) Greater than the smallest capacitor
Ans:A
3) When current and voltage arte in phase in an ac circuit, the is equal to zero.
A) Resistance
B) Reactance
C) Inductance
D) Capacitance
Ans:B
4) Thevenin’s theorem is what form of an equivalent circuit?
A) Current
B) Voltage
C) Both current and voltage
D) Neither current nor voltage
Ans:B
5) Which of the following combination of length and cross-sectional area will give a certain volume of copper the least resistance?
A) 2L and l/2 A
B) Does not matter because the volume of copper remains the same
C) L and A
D) 1/2L and 2 A
Ans:D
6) The ratio between the reactive power and the apparent power of an ac load is called
A) Quality factor
B) Power factor
C) Power ratio
D) Reactive power
Ans:D
7) What is the efficiency under the conditions of maximum power transfer?
A) 50 %
B) 100 %
C) 25 %
D) 75 %
Ans:A
8) The charging of a capacitor through a resistance follows what law?
A) Linear law
B) Hyperbolic law
C) Inverse-square law
D) Exponential law
Ans:D
9) Norton’s theorem is what form of an ac equivalent circuit?
A) Voltage
B) Current
C) Both voltage and current
D) Neither voltage nor current
Ans:B
10) What is the total capacitance of 10 capacitors, each 0f 20 µF in series?
A) 200 µF
B) 2 µF
C) 100 µF
D) 0.5 µF
Ans:B
If you like my post please share it with your friends and subscribe to latest updates.. If you have doubts you can start new topic on forum and start discussion with our readers..
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