ECAT Pre Engineering Physics Chapter 16 MCQ Test With Answer

MCQ's Test For Physics ECAT Pre Engineering Chapter 16 Alternating Current

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

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Physics ECAT Pre Engineering Chapter 16 Alternating Current

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Question # 1

In frequency modulation (FM), the carrier waves amplitude

Question # 2

Electromagnetic waves transmit energy equal to

Question # 3

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

Question # 4

Alternating current can be transmitted:

Question # 5

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 # 6

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

Question # 7

The bridge circuit of full wave rectification uses

Question # 8

Which of the following has a great concentration of impurity

Question # 9

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

Question # 10

Chock consumes externally small

Question # 11

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

Question # 12

The basic circuit elements of A.C circuit are

Question # 13

In RLC series circuit, resonance occurs when

Question # 14

The sum of positive and negative peak values is called:

Question # 15

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

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ECAT Physics Chapter 16 Important MCQ's

Sr.# Question Answer
1 Alternating current is produced by a voltage source which polarity:
A. Remains the same
B. Reverse after period T
C. Keeps on reversing with time
D. Reverse after every time interval T/2
2 Which one of the following waves belongs to electromagnetic spectrum
A. Radio and TV waves
B. Radar waves
C. Micro waves
D. All of them
3 The input resistance of the OP-AMP is the resistance between the
A. (-) input and output
B. (+) input and output
C. (-) and (+) inputs
D. between any inputs
4 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
5 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
6 For normal operation of transistor, the batteries
A. VCCis of much lower value than VBB
B. VCCis of much higher value than VBB
C. VCC is equal toVBB
D. none of these
7 At higher frequency of the alternating current, the capacitive reactance Xc
A. Increases
B. Decreases
C. Remains the same
D. Increases only when the voltage increases
8 Chock consumes externally small
A. Charge
B. Current
C. Power
D. Potential
9 In half wave rectification
A. both halves of the input voltage is used
B. only one half of the input voltage is used
C. either of these
D. none of these
10 In which of the following components, pn-junction is used
A. light emitting diode
B. photo diode
C. photo voltaic cell
D. all of these

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