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) For a series circuit, the higher the quality factor
A) The greater the bandwidth
B) The narrower the pass band
C) The broader the resonance curve
D) The wider the passband
Ans:B
2) "Any resistance R in a branch of a network in which a current I is f lowing can be replaced by a voltage equal to IR”. This states
A) Compensation theorem
B) Reciprocity theorem
C) Millman’s theorem
D) Superposition theorem
Ans:A
3) The internal resistance of an ideal current source is
A) Infinite
B) Zero
C) Equal to the load resistance
D) To be determined
Ans:A
4) If three 100-pF capacitors are connected in series, then the total capacitance is
A) 300 pF
B) 100 pF
C) 50 pF
D) 33.3 pF
Ans:D
5) An inductance of 1 mH is
A) 0.001 H
B) 0.01 H
C) 0.0001 H
D) 0.10 H
Ans:A
6) A capacitor is basically constructed of
A) Two conductor separated by a dielectric
B) Two dielectric separated by a conductor
C) Conductors and dielectric
D) Conductors and semiconductors
Ans:A
7) In an inductive coil, the rate of rise of current is maximum
A) Near the final maximum value of current
B) At mid-value of current
C) At half-power points
D) After one time constant
Ans:A
8) Two complex numbers or phasors are said to be conjugate if they
A) Differ only in the algebraic sign of their quadratic components
B) Differ only in the algebraic sign of their real components
C) Are equal in their real and quadrature components including algebraic signs
D) Are equal in their real components but differ in their quadrature components
including algebraic signs.
Ans:A
9) In an ac circuit With a resistive branch and an inductive branch in parallel, the
A) Voltage across the inductance leads the voltage across the resistance by 90°
B) Resistive branch current is 90° out of phase with the inductive branch current
C) Resistive and inductive branch currents have the same phase
D) Resistive and inductive branch currents are 180° out-of-phase
Ans:B
10) In an ac circuit with XL and R in series, the
A) Voltages across R and XL are in phase
B) Voltage across R lags the voltage across XL by 90°
C) Voltages across R and XL are 180° out-of-phase
D) Voltage across R leads the voltage across XL by 90°
Ans:B
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1) For a series circuit, the higher the quality factor
A) The greater the bandwidth
B) The narrower the pass band
C) The broader the resonance curve
D) The wider the passband
Ans:B
2) "Any resistance R in a branch of a network in which a current I is f lowing can be replaced by a voltage equal to IR”. This states
A) Compensation theorem
B) Reciprocity theorem
C) Millman’s theorem
D) Superposition theorem
Ans:A
3) The internal resistance of an ideal current source is
A) Infinite
B) Zero
C) Equal to the load resistance
D) To be determined
Ans:A
4) If three 100-pF capacitors are connected in series, then the total capacitance is
A) 300 pF
B) 100 pF
C) 50 pF
D) 33.3 pF
Ans:D
5) An inductance of 1 mH is
A) 0.001 H
B) 0.01 H
C) 0.0001 H
D) 0.10 H
Ans:A
6) A capacitor is basically constructed of
A) Two conductor separated by a dielectric
B) Two dielectric separated by a conductor
C) Conductors and dielectric
D) Conductors and semiconductors
Ans:A
7) In an inductive coil, the rate of rise of current is maximum
A) Near the final maximum value of current
B) At mid-value of current
C) At half-power points
D) After one time constant
Ans:A
8) Two complex numbers or phasors are said to be conjugate if they
A) Differ only in the algebraic sign of their quadratic components
B) Differ only in the algebraic sign of their real components
C) Are equal in their real and quadrature components including algebraic signs
D) Are equal in their real components but differ in their quadrature components
including algebraic signs.
Ans:A
9) In an ac circuit With a resistive branch and an inductive branch in parallel, the
A) Voltage across the inductance leads the voltage across the resistance by 90°
B) Resistive branch current is 90° out of phase with the inductive branch current
C) Resistive and inductive branch currents have the same phase
D) Resistive and inductive branch currents are 180° out-of-phase
Ans:B
10) In an ac circuit with XL and R in series, the
A) Voltages across R and XL are in phase
B) Voltage across R lags the voltage across XL by 90°
C) Voltages across R and XL are 180° out-of-phase
D) Voltage across R leads the voltage across XL by 90°
Ans:B
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