ECAT Pre General Science Physics Chapter 16 MCQ Test With Answer

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

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

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ECAT Pre General Science Physics Chapter 16 Alternating Current

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Question # 1

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

Question # 2

Chock consumes externally small

Question # 3

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

Question # 4

The highest value reached by the voltage or current:

Question # 5

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

Question # 6

In free space, the speed of electromagnetic waves is

Question # 7

Which one of the following Electro-magnetic wave have the highest frequency and shortest wave-length

Question # 8

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

Question # 9

The open loop gain of OP-AMP is of the order of

Question # 10

Alternating current can be transmitted:

Question # 11

An A.C varies as a function of

Question # 12

For normal operation of transistor, the batteries

Question # 13

OP-AMP has the following input terminals

Question # 14

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

Question # 15

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

Question # 16

Which of the following diode is used for the detection of light

Question # 17

Which of the following diodes can operate in the reverse biased condition

Question # 18

Average value of A.C voltage during one cycle is

Question # 19

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

Question # 20

The device which allows only the flow of an A.C. through a circuit is

Question # 21

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

Question # 22

A signal is amplified at the output without any change of phase, if it is applied at the

Question # 23

A diode characteristic curve is a plot between

Question # 24

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

Question # 25

The emitter-base junction of a transistor is forward-biased and collector-base junction is reverse-biased. If the base current is increased, its

Question # 26

Electromagnetic waves transmit energy equal to

Question # 27

At resonance, the impedance of RLC series circuit is

Question # 28

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

Question # 29

To design a resonant circuit of frequency 100 KHz with an inductor of inductance 5 mH, we need a capacitor of capacitance

Question # 30

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

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ECAT Physics Chapter 16 Important MCQ's

Sr.# Question Answer
1 Which one of the following waves belongs to electromagnetic spectrum
A. Radio and TV waves
B. Radar waves
C. Micro waves
D. All of them
2 If the value of C in a series RLC circuit is increased, the resonant frequency
A. Is not affected
B. Increase
C. Remains the same
D. Decreases
3 The basic circuit elements of A.C circuit are
A. Resistor
B. Inductor
C. Capacitor
D. All the three
4 The basic circuit element in A.C. circuits are:
A. Resistor and capacitor
B. Resistor and Inductor
C. Capacitor only
D. Both (B) and (C)
5 The open loop gain of OP-AMP is of the order of
A. 102
B. 103
C. 104
D. 105
6 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
7 In frequency modulation (FM), the carrier waves amplitude
A. Remains constant
B. Increase
C. Decreases
D. None of these
8 The closed loop gain of the non-inverting amplifier is given by
A. G = R2/R1
B. G = -R2/R1
C. G = 1 - R2/R1
D. G = 1 + T2/R1
9 Average value of A.C voltage during one cycle is
A. 1
B. Zero
C. Maximum
D. Variable
10 During each cycle, alternating voltage reaches a peak value
A. One time
B. Two times
C. Four times
D. A number of times depending on the frequency

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