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 Instantaneous value of alternative current maybe:

Question # 2

In half wave rectification

Question # 3

Alternating current can induce voltage because it has a

Question # 4

Most OP-AMP operates with

Question # 5

Chock consumes externally small

Question # 6

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

Question # 7

If we connected the ordinary DC ammeter to measure alternating current, it would measure its:

Question # 8

For a n-p-n transistor, the conventional current equation can be written as

Question # 9

The time interval during which the Voltage source changes its polarity once is known as:

Question # 10

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

Question # 11

Alternating current is produced by a voltage source which polarity:

Question # 12

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

Question # 13

In n-p-n transistor, emitter base junction is kept

Question # 14

In free space, the speed of electromagnetic waves is

Question # 15

The basic circuit element in A.C. circuits are:

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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 In which of the following diodes when an electron combines with a hole during the forward biasing, photon of visible light is emitted.
A. photo diode
B. light emitting diode
C. photo voltaic cell
D. all of them
3 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
4 Which of the following diode is used to derive the current in external circuit when light is incident in the circuit
A. photo diode
B. light emitting diode
C. photo voltaic cell
D. none of these
5 A P-N juction or semiconductor diode cannot be used as
A. A rectifier
B. Detector
C. Oscillator
D. An amplifier
6 The r.m.s. value of alternating current is equal to its maximum value at angle of
A. 60°
B. 45°
C. 30°
D. 90°
7 Which of the following diodes can operate in the reverse biased condition
A. photo diode
B. light emitting diode
C. photo voltaic cell
D. none of these
8 OP-AMP has the following input terminals
A. one
B. two
C. three
D. four
9 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
10 The phase angle of a series RLC circuit at resonance is
A. 180°
B. 90°
C. 0°
D. None of the these

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