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 a transistor is used as a switch the circuit in which the current is to be switched OFF and ON, is connected between the

Question # 2

The phase angle of a series RLC circuit at resonance is

Question # 3

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

Question # 4

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

Question # 5

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

Question # 6

When the pn-junction is in reversed biased, current flows through the junction due to the

Question # 7

A digital system deals with quantities or variables which have

Question # 8

A resonance curve for RLC series circuit is a plot of frequency versus

Question # 9

The wave form of alternating voltage is the graph between:

Question # 10

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

Question # 11

The sum of positive and negative peak values is called:

Question # 12

The basic circuit element in D.C. circuit is:

Question # 13

An A.C. voltage is applied across the inductor. When the frequency of the voltage is increased, the current

Question # 14

Alternating current can induce voltage because it has a

Question # 15

In RLC series circuit, resonance occurs when

Question # 16

SI unit of impedance is

Question # 17

The impedance of RLC series resonance circuit at resonant frequency is

Question # 18

The highest value reached by the voltage or current:

Question # 19

The value of output resistance of OP-AMOP is of the order of

Question # 20

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

Question # 21

For the normal operation of the transistor, its

Question # 22

A changing magnetic flux creates around itself

Question # 23

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

Question # 24

The bridge circuit of full wave rectification uses

Question # 25

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

Question # 26

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 # 27

The length of rotating vector (on a certain scale) represents the:

Question # 28

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

Question # 29

The closed loop gain of the inverting amplifier is written as

Question # 30

Transmitting antenna emits

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ECAT Physics Chapter 16 Important MCQ's

Sr.# Question Answer
1 The value of current gain of n-p-n transistor is of the order of
A. tens
B. hundreds
C. thousands
D. ten thousands
2 During the negative half-cycle of the half-wave rectification, the diode
A. does not conduct
B. conducts
C. either of these
D. none of these
3 The open loop gain of OP-AMP is of the order of
A. 102
B. 103
C. 104
D. 105
4 Nowadays, Most of the electric energy is produced by the A.C. generators using:
A. Hydal water
B. Geothermal energy
C. Solar energy
D. Biomass
5 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)
6 During the positive half-cycle in the half-wave rectification,the diode
A. does not conduct
B. conducts
C. either of these
D. neither of these
7 A diode characteristic curve is a plot between
A. current and time
B. voltage and time
C. voltage and current
D. forward voltage and reversed voltage
8 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
9 The wave form of alternating voltage is the graph between:
A. Voltage across X-axis and time across y-axis
B. Current and time
C. Voltage along y-axis and time along x-axis
D. Voltage and current
10 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

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