ECAT Pre Engineering Physics Chapter 16 MCQ Test With Answer

MCQ's Test For Physics ECAT Pre Engineering Chapter 16 Alternating Current

Try The MCQ's Test For Physics ECAT Pre Engineering Chapter 16 Alternating Current

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Physics ECAT Pre Engineering Chapter 16 Alternating Current

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Question # 1

Alternating current is produced by a voltage source which polarity:

Question # 2

The r.m.s. value of alternating current is equal to its maximum value at angle of

Question # 3

The average of A.C. current and voltage over a complete cycle is

Question # 4

Which of the following diode is used to derive the current in external circuit when light is incident in the circuit

Question # 5

Alternating current can be transmitted:

Question # 6

The closed loop gain of the inverting amplifier is written as

Question # 7

Peak value of alternative current is:

Question # 8

The basic circuit elements of A.C circuit are

Question # 9

When either L or C is increased, the resonant frequency of the RLC series circuit

Question # 10

The total reactance of a series RLC circuit at resonance is

Question # 11

In RLC series circuit, resonance occurs when

Question # 12

When the emitter-base junction of a transistor is reverse biased, collector current

Question # 13

An A.C. voltage is applied across the inductor. When the frequency of the voltage is increased, the current

Question # 14

In an A.C circuit with resistor only, the current and voltage have a phase angle of

Question # 15

When the pn-junction is in reversed biased, current flows through the junction due to the

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ECAT Physics Chapter 16 Important MCQ's

Sr.# Question Answer
1 When either L or C is increased, the resonant frequency of the RLC series circuit
A. Increases
B. Decreases
C. Remains the same
D. Becomes zero
2 In a transistor, the central region is called
A. collector
B. emitter
C. base
D. none of them
3 The sum of positive and negative peak values is called:
A. Instantaneous value
B. Peak value
C. Rms valuie
D. Peak-to peak-value
4 Alternating current is produced by a voltage source which polarity:
A. Remains the same
B. Reverse after period T
C. Keeps on reversing with time
D. Reverse after every time interval T/2
5 The basic circuit elements of A.C circuit are
A. Resistor
B. Inductor
C. Capacitor
D. All the three
6 The average of A.C. current and voltage over a complete cycle is
A. Maximum
B. zero
C. Neither zero nor maximum
D. None of these
7 For the normal operation of the transistor, its
A. emitter-base and collector base junctions are forward biased
B. emitter-base junction is reversed biased and collector base junction is forward biased
C. emitter-base junction is forward biased and collector-base junction is reverse biased
D. any one of these
8 Alternating current can be transmitted:
A. To long distance
B. At very high cost
C. At very low cost
D. Both (A) and (C)
9 The closed loop gain of the inverting amplifier is written as
A. G = R2/R1
B. G = 1 + R2/R1
C. G = -R2/R1
D. G = 1 - R2/R1
10 A signal is amplified at the output without any change of phase, if it is applied at the
A. inverting input
B. non-inverting input
C. at any of the input
D. none of these

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