ECAT Pre Computer Science Chapter 16 MCQ Test With Answer

MCQ's Test For ECAT Physics Chapter 16 Alternating Current

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

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ECAT Physics Chapter 16 Alternating Current

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Question # 1

SI unit of impedance is

Question # 2

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

Question # 3

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

Question # 4

For the normal operation of the transistor, its

Question # 5

The Instantaneous value of alternative current maybe:

Question # 6

A digital system deals with quantities or variables which have

Question # 7

The waveform of alternating voltage is a:

Question # 8

Which one of the following is correct?

Question # 9

A signal appears after amplification, at the output terminal with a phase shift of 180° , if it is applied at

Question # 10

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

Question # 11

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

Question # 12

The R1= infinity and R2= 0, then the gain of non-inverting amplifier is

Question # 13

The sum of positive and negative peak values is called:

Question # 14

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 # 15

An A.C varies as a function of

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ECAT Physics Chapter 16 Important MCQ's

Sr.# Question Answer
1 The waveform of alternating voltage is a:
A. Square
B. Rectangular
C. Saw-tooth
D. Sinusoidal
2 In a transistor, the central region is called
A. collector
B. emitter
C. base
D. none of them
3 Which one of the following is correct?
A. Vo= 1.414 Vrms
B. Iams= 1.414 Io
C. VO = 10.70 Vrms
D. Both a and b
4 Transmitting antenna emits
A. Magnetic waves
B. Electric waves
C. Electromagnetic waves
D. Sound waves
5 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
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 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
8 The open loop gain of OP-AMP is of the order of
A. 102
B. 103
C. 104
D. 105
9 The magnitude of alternative voltage V:
A. Always increase
B. Always decrease
C. Remains constant
D. Does not remain constant
10 The basic circuit elements of A.C circuit are
A. Resistor
B. Inductor
C. Capacitor
D. All the three

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