ECAT Pre General Science Physics Chapter 16 Alternating Current

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  • Chapter NameCh 16 - Alternating Current

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

At higher frequency of the alternating current, the capacitive reactance Xc

Question # 2

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

Question # 3

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

Question # 4

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

Question # 5

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

Question # 6

In a transistor, the central region is called

Question # 7

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

Question # 8

The bridge circuit of full wave rectification uses

Question # 9

Peak value of alternative current is:

Question # 10

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

Question # 11

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

Question # 12

A digital system deals with quantities or variables which have

Question # 13

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

Question # 14

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

Question # 15

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

Question # 16

An A.C varies as a function of

Question # 17

The value of current gain of n-p-n transistor is of the order of

Question # 18

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

Question # 19

At resonance, the impedance of RLC series circuit is

Question # 20

A diode characteristic curve is a plot between

Question # 21

SI unit of impedance is

Question # 22

In half wave rectification

Question # 23

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

Question # 24

The total reactance of a series RLC circuit at resonance is

Question # 25

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

Question # 26

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

Question # 27

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 # 28

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 # 29

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

Question # 30

Transmitting antenna emits

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