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# Circuits and Circuit Theory MCQs | Page - 1

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V

Vinay Kumar • 8.45K Points
Tutor III

## `Q. 1) Inductance of a coil Varies`

(A) directly as the cross-sectional area of magnetic core
(B) directly as square of number of turns
(C) directly as the permeability of the core
(D) all of the above

V

Vinay Kumar • 8.45K Points
Tutor III

## `Q. 2) A heater is rated as 230 V, 10 kW, A.C. The value 230 V refers to`

(A) average voltage
(B) r.m.s. voltage
(C) peak voltage
(D) none of the above

V

Vinay Kumar • 8.45K Points
Tutor III

## `Q. 3) A parallel AC. circuit in resonance will`

(A) have a high voltage developed across each inductive and capacitive section
(B) have a high impedance
(C) act like a resistor of low value
(D) have current in each section equal to the line current

V

Vinay Kumar • 8.45K Points
Tutor III

## `Q. 4) A pure capacitor connected across an A.C. voltage consumed 50 W. This is due to`

(A) the capacitive reactance in ohms
(B) the current flowing in capacitor
(C) the size of the capacitor being quite big
(D) the statement is incorrect

V

Vinay Kumar • 8.45K Points
Tutor III

## `Q. 5) A pure inductance connected across 250 V, 50 Hz supply consumes 100 W. This consumption can be attributed to`

(A) the big size of the inductor
(B) the reactance of the inductor
(C) the current flowing in the inductor
(D) the statement given is false

V

Vinay Kumar • 8.45K Points
Tutor III

## `Q. 6) A sine wave has a frequency of 50 Hz. Its angular frequency is _________ radian/second.`

(A) 100 n
(B) 50 jt
(C) 25 JT
(D) 5 n

V

Vinay Kumar • 8.45K Points
Tutor III

## `Q. 7) All definitions of power factor of a series R-L-C circuit are correct except`

(A) ratio of net reactance and impedance
(B) ratio of kW and kVA
(C) ratio of J and Z
(D) ratio of W and VA

V

Vinay Kumar • 8.45K Points
Tutor III

## `Q. 8) All the rules and laws of D.C. circuit also apply to A.C. circuit containing`

(A) capacitance only
(B) inductance only
(C) resistance only
(D) All of the above

V

Vinay Kumar • 8.45K Points
Tutor III

## `Q. 9) An A.C. voltage is impressed across a pure resistance of 3.5 ohms in parallel with a pure inductance of impedance of 3.5 ohms,`

(A) the current through the resistance is more
(B) the current through the resistance is less
(C) both resistance and inductance carry equal currents
(D) none of the above

V

Vinay Kumar • 8.45K Points
Tutor III

## `Q. 10) Aphasoris`

(A) a line which represents the magnitude and phase of an alternating quantity
(B) a line representing the magnitude and direction of an alternating quantity
(C) a coloured tag or band for distinction between different phases of a 3-phase supply
(D) an instrument used for measuring phases of an unbalanced 3-phase load

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