ECAT Pre General Science Physics Chapter 16 MCQ Test With Answer

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

The basic circuit elements of A.C circuit are

Question # 2

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

Question # 3

Most OP-AMP operates with

Question # 4

The magnitude of alternative voltage V:

Question # 5

At resonance frequency the impedance of parallel resonance circuit is

Question # 6

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

Question # 7

An A.C varies as a function of

Question # 8

For the normal operation of the transistor, its

Question # 9

The phase angle of a series RLC circuit at resonance is

Question # 10

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

Question # 11

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

Question # 12

At resonance, the impedance of RLC series circuit is

Question # 13

Electromagnetic waves transmit energy equal to

Question # 14

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

Question # 15

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

Question # 16

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

Question # 17

Which one of the following waves belongs to electromagnetic spectrum

Question # 18

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

Question # 19

If the value of C in a series RLC circuit is increased, the resonant frequency

Question # 20

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

Question # 21

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

Question # 22

Unless stated otherwise, when we speak of A.C. meter reading, we usualy mean:

Question # 23

Alternating current can be transmitted:

Question # 24

A diode characteristic curve is a plot between

Question # 25

A p-n junction is formed when a crystal of silicon is growth in such a way that its one half is doped with trivalent impurity and the other half with a impurity from

Question # 26

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

Question # 27

The impedance of RLC series resonance circuit at resonant frequency is

Question # 28

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

Question # 29

When the p-n junction is forward biased its resistance is of the order of

Question # 30

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

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ECAT Class Physics Chapter 16 Important MCQ's

Sr.# Question Answer
1 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
2 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
3 SI unit of impedance is
A. hertz
B. henry
C. ampere
D. ohms
4 At resonance, the impedance of RLC series circuit is
A. Maximum
B. Zero
C. Minimum
D. Determinate
5 The value of output resistance of OP-AMOP is of the order of
A. few ohms
B. few hundred ohms
C. several kilo ohms
D. several mega ohms
6 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
7 The value of the potential difference across the depletion region for the case of germanium is
A. 0.3 V
B. 0.5 V
C. 0.7 V
D. 0.9 V
8 The most common source of alternating voltage is:
A. Motor
B. Transformer
C. AC genrator
D. Both (A) and (C)
9 When the pn-junction is in reversed biased, current flows through the junction due to the
A. majority carriers
B. minority carriers
C. either of them
D. none of them
10 The total reactance of a series RLC circuit at resonance is
A. zero
B. Equal to the resistance
C. Infinity
D. Capacitive

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