ECAT Pre General Science Physics Chapter 16 MCQ Test With Answer for Physics chapter 16 (Alternating Current)

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

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ECAT Pre General Science Physics Chapter 16 Alternating Current Online Test

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Question # 1

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

Question # 2

In a normally biased n-p-n transistor, an electron c current IEflows from the

Question # 3

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

Question # 4

The most common source of alternating voltage is:

Question # 5

In half wave rectification

Question # 6

In free space, the speed of electromagnetic waves is

Question # 7

For normal operation of transistor, the batteries

Question # 8

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 # 9

At resonance, the impedance of RLC series circuit is

Question # 10

The alternative voltage of current is actually measured by:

Question # 11

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

Question # 12

The Instantaneous value of alternative current maybe:

Question # 13

In RLC series circuit, resonance occurs when

Question # 14

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

Question # 15

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 # 16

A sinusoidally alternating voltage or current can be graphically represented by a:

Question # 17

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

Question # 18

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

Question # 19

Which of the following diode is used to derive the current in external circuit when light is incident in the circuit

Question # 20

Peak value of alternative current is:

Question # 21

In series RC circuit when R=Xc, then the phase angle is

Question # 22

The phase at the positive peak of an A.C. cycle is:

Question # 23

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

Question # 24

The wave form of alternating voltage is the graph between:

Question # 25

SI unit of impedance is

Question # 26

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

Question # 27

The power factor of resonant series circuit is

Question # 28

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

Question # 29

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

Question # 30

During the negative half-cycle of the half-wave rectification, the diode

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