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

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

Question # 2

At resonance, the impedance of RLC series circuit is

Question # 3

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

Question # 4

Which of the following diodes can operate in the reverse biased condition

Question # 5

Electromagnetic waves transmit energy equal to

Question # 6

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

Question # 7

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

Question # 8

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 # 9

In RLC series circuit, resonance occurs when

Question # 10

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

Question # 11

The Instantaneous value of alternative current maybe:

Question # 12

At resonance, the phase angle for RLC series resonance circuit equals

Question # 13

At resonance frequency the impedance of parallel resonance circuit is

Question # 14

Which one of the following waves belongs to electromagnetic spectrum

Question # 15

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

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ECAT Physics Chapter 16 Important MCQ's

Sr.# Question Answer
1 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
2 When the p-n junction is forward biased its resistance is of the order of
A. few mega ohms
B. few kilo ohms
C. few ohms
D. few milli ohms
3 In frequency modulation (FM), the carrier waves amplitude
A. Remains constant
B. Increase
C. Decreases
D. None of these
4 Average value of A.C voltage during one cycle is
A. 1
B. Zero
C. Maximum
D. Variable
5 The time interval during which the Voltage source changes its polarity once is known as:
A. Time period T
B. Half the time period
C. Quarter the time period
D. Two third of the time period
6 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
7 The entire wave form of sinusoidal voltage is actually a set of all the:
A. Positive maximum value + Voand negative maximum value -Vo
B. Posiotive maximum value +Vo and zero
C. Zero and negative maximum value -Vo
D. Any of these
8 The power factor of resonant series circuit is
A. 1
B. 0
C. -1
D. 0.5
9 A digital system deals with quantities or variables which have
A. only one state
B. only two discrete states
C. three discrete states
D. four discrete states
10 The value of current gain of n-p-n transistor is of the order of
A. tens
B. hundreds
C. thousands
D. ten thousands

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