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) Rationalizing the denominator of a complex number means
A) Eliminating the j component in the denominator
B) Adding j component in the denominator
C) Eliminating the j component in the numerator
D) Adding j component in the numerator
Ans:A
2) When two complex conjugates are subtracted, the result is a
A) Quadrature component only
B) Complex component
C) In-phase component
D) Real component
Ans:A
3) A coil of inductance L has an inductive reactance of XL in an ac circuit in which the effective current is I. The coil is made from a superconducting material. The rate at which power is dissipated in the coil is
A) 0
B) I^2XL
C) IXL
D) IXL^2
Ans:A
4) If the capacitance of mica capacitor is 5 times the capacitance of air capacitor, then the relative permittivity of mica is
A) 2.5
B) 5
C) 10
D) 25
Ans:B
5) The hot resistance of an incandescent lamp is about ..............times its cold resistance.
A) 10
B) 5
C) 50
D) 100
Ans:A
6) When the temperature of copper wire is increased its resistance is
A) Increased
B) Decreased
C) Constant
D) Zero
Ans:A
7) A trimmer is a variable capacitor in which capacitance is varied by changing the
A) Number of plates
B) Dielectric
C) Distance between plates
D) Plate area
Ans:C
8) The reason why electrical appliances are not connected in series.
A) Greater electrical power saving
B) Power loss is minimum
C) Appliances have different current ratings
D) All of the above
Ans:C
9) Form its definition, the unit of electric field, 𝛏 is the N/C and equivalent unit of 𝛏 is the
A) V(m)2
B) V(m)
C) V/m2
D) V/m
Ans:D
10) Which of the following is the peakiest?
A) Square wave
B) Sinusoidal wave
C) Triangular wave
D) Rectangular wave
Ans:C
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1) Rationalizing the denominator of a complex number means
A) Eliminating the j component in the denominator
B) Adding j component in the denominator
C) Eliminating the j component in the numerator
D) Adding j component in the numerator
Ans:A
2) When two complex conjugates are subtracted, the result is a
A) Quadrature component only
B) Complex component
C) In-phase component
D) Real component
Ans:A
3) A coil of inductance L has an inductive reactance of XL in an ac circuit in which the effective current is I. The coil is made from a superconducting material. The rate at which power is dissipated in the coil is
A) 0
B) I^2XL
C) IXL
D) IXL^2
Ans:A
4) If the capacitance of mica capacitor is 5 times the capacitance of air capacitor, then the relative permittivity of mica is
A) 2.5
B) 5
C) 10
D) 25
Ans:B
5) The hot resistance of an incandescent lamp is about ..............times its cold resistance.
A) 10
B) 5
C) 50
D) 100
Ans:A
6) When the temperature of copper wire is increased its resistance is
A) Increased
B) Decreased
C) Constant
D) Zero
Ans:A
7) A trimmer is a variable capacitor in which capacitance is varied by changing the
A) Number of plates
B) Dielectric
C) Distance between plates
D) Plate area
Ans:C
8) The reason why electrical appliances are not connected in series.
A) Greater electrical power saving
B) Power loss is minimum
C) Appliances have different current ratings
D) All of the above
Ans:C
9) Form its definition, the unit of electric field, 𝛏 is the N/C and equivalent unit of 𝛏 is the
A) V(m)2
B) V(m)
C) V/m2
D) V/m
Ans:D
10) Which of the following is the peakiest?
A) Square wave
B) Sinusoidal wave
C) Triangular wave
D) Rectangular wave
Ans:C
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