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

The amplifier which us used to perform mathematical operations electronically is known as

Question # 2

A digital system deals with quantities or variables which have

Question # 3

In RLC series circuit, resonance occurs when

Question # 4

Mathematical manipulation of the two quantized states can be best carried if they are represented by

Question # 5

In describing functions of digital systems, a closed switch will be shown as

Question # 6

The wave form of alternating voltage is the graph between:

Question # 7

Conversion of alternating current into direct current is called

Question # 8

In which of the following components, pn-junction is used

Question # 9

The value of current gain of n-p-n transistor is of the order of

Question # 10

A diode characteristic curve is a plot between

Question # 11

Electromagnetic waves transmit energy equal to

Question # 12

Most OP-AMP operates with

Question # 13

The power factor of resonant series circuit is

Question # 14

If we connect a A.C. volt meter to read A.C. voltage, It would read its:

Question # 15

Nowadays, Most of the electric energy is produced by the A.C. generators using:

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ECAT Physics Chapter 16 Important MCQ's

Sr.# Question Answer
1 If we connected the ordinary DC ammeter to measure alternating current, it would measure its:
A. Instantaneous value
B. RMS value
C. Value averaged over a cycle
D. Either (B) or (C)
2 The length of rotating vector (on a certain scale) represents the:
A. Peak value of alternating quantity
B. RMS value of alternating quantity
C. Instantaneous value of alternating quantity
D. Either (B) or (C)
3 The basic circuit elements of A.C circuit are
A. Resistor
B. Inductor
C. Capacitor
D. All the three
4 When the pn-junction is connected reversed biased, its resistance is of the order of
A. few ohms
B. few kilo-ohms
C. few mega-ohms
D. few mili-ohms
5 When the p-n junction is forward biased its resistance is of the order of
A. few mega ohms
B. few kilo ohms
C. few ohms
D. few milli ohms
6 The R1= infinity and R2= 0, then the gain of non-inverting amplifier is
A. zero
B. infinity
C. one
D. any one of these
7 A sinusoidally alternating voltage or current can be graphically represented by a:
A. Vector
B. Rotating vector
C. Clockwise vector
D. Anticlockwise voltage vector
8 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
9 At resonance, the phase angle for RLC series resonance circuit equals
A. 0°
B. 90°
C. 180°
D. 270°
10 The sum of positive and negative peak values is called:
A. Instantaneous value
B. Peak value
C. Rms valuie
D. Peak-to peak-value

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