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

A diode characteristic curve is a plot between

Question # 2

At resonance frequency the impedance of parallel resonance circuit is

Question # 3

When the pn-junction is forward biased. the current flows through it is of the order of

Question # 4

At higher frequency of the alternating current, the capacitive reactance Xc

Question # 5

In a transistor, if the central region is p-type then this type of transistor is known as

Question # 6

The circuit which is used to smooth the output voltage of the full-wave rectification is known as

Question # 7

The phase angle of a series RLC circuit at resonance is

Question # 8

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

Question # 9

At resonance, the phase angle for RLC series resonance circuit equals

Question # 10

The output voltage of half wave rectification is in the form of

Question # 11

Average value of A.C voltage during one cycle is

Question # 12

The closed loop gain of the non-inverting amplifier is given by

Question # 13

An A.C varies as a function of

Question # 14

SI unit of impedance is

Question # 15

The wave form of alternating voltage is the graph between:

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ECAT Physics Chapter 16 Important MCQ's

Sr.# Question Answer
1 The total reactance of a series RLC circuit at resonance is
A. zero
B. Equal to the resistance
C. Infinity
D. Capacitive
2 The basic circuit elements of A.C circuit are
A. Resistor
B. Inductor
C. Capacitor
D. All the three
3 The most common source of alternating voltage is:
A. Motor
B. Transformer
C. AC genrator
D. Both (A) and (C)
4 The amplifier which us used to perform mathematical operations electronically is known as
A. calculator
B. OP-AMP
C. computer
D. any one of them
5 Alternating current can be transmitted:
A. To long distance
B. At very high cost
C. At very low cost
D. Both (A) and (C)
6 When electrons in the transmitting antenna vibrate 94000 time per second, they produce radiowaves having frequency
A. 9.4 kHz
B. 940 kHz
C. 94 kHz
D. None of these
7 When the emitter-base junction of a transistor is reverse biased, collector current
A. Reverses
B. Increases
C. Decreases
D. Stops
8 At higher frequency of the alternating current, the capacitive reactance Xc
A. Increases
B. Decreases
C. Remains the same
D. Increases only when the voltage increases
9 Chock consumes externally small
A. Charge
B. Current
C. Power
D. Potential
10 In an A.C circuit with resistor only, the current and voltage have a phase angle of
A. 90°
B. 0°
C. 180°
D. none of these

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