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

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

Question # 2

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

Question # 3

Due to the high value of the input resistance, practically, the value of the current which flows between the input terminals is

Question # 4

In a transistor, the central region is called

Question # 5

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

Question # 6

The basic circuit elements of A.C circuit are

Question # 7

At resonance frequency the impedance of parallel resonance circuit is

Question # 8

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

Question # 9

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

Question # 10

Alternating current can induce voltage because it has a

Question # 11

The value of the input resistance of OP-AMP is of the order of

Question # 12

Which one of the following waves belongs to electromagnetic spectrum

Question # 13

When the pn-junction is connected reversed biased, its resistance is of the order of

Question # 14

The impedance of RLC series resonance circuit at resonant frequency is

Question # 15

A digital system deals with quantities or variables which have

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ECAT Physics Chapter 16 Important MCQ's

Sr.# Question Answer
1 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
2 In a transistor, if the central region is p-type then this type of transistor is known as
A. p-n-p transistor
B. n-p-n transistor
C. either of these
D. none of these
3 Mathematical manipulation of the two quantized states can be best carried if they are represented by
A. high - low
B. yes - no
C. on - off
D. 0 - 1
4 A digital system deals with quantities or variables which have
A. only one state
B. only two discrete states
C. three discrete states
D. four discrete states
5 Peak value of alternative current is:
A. one of its Instantaneous value
B. Equal to its RMS value
C. The same as its peak-to-peak value
D. Both (B) and (C)
6 The basic circuit elements of A.C circuit are
A. Resistor
B. Inductor
C. Capacitor
D. All the three
7 In series RC circuit when R=Xc, then the phase angle is
A. 0°
B. 90°
C. 70°
D. 45°
8 For a n-p-n transistor, the conventional current equation can be written as
A. IE+ IC= IB
B. IC- IB= IE
C. IC+ IB= IE
D. IB+ IE= IC
9 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
10 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°

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