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

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

Question # 2

Chock consumes externally small

Question # 3

The closed loop gain of the inverting amplifier is written as

Question # 4

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

Question # 5

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

Question # 6

The sum of positive and negative peak values is called:

Question # 7

The phase angle of a series RLC circuit at resonance is

Question # 8

In a transistor, the central region is called

Question # 9

Nowadays, Most of the electric energy is produced by the A.C. generators using:

Question # 10

The most common source of alternating voltage is:

Question # 11

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

Question # 12

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

Question # 13

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

Question # 14

Electromagnetic waves transmit energy equal to

Question # 15

The basic circuit elements of A.C circuit are

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ECAT Physics Chapter 16 Important MCQ's

Sr.# Question Answer
1 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
2 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
3 Alternating current can be transmitted:
A. To long distance
B. At very high cost
C. At very low cost
D. Both (A) and (C)
4 In a transistor, if the central region is n-type, then this type of transistor is known as
A. n-p-n transistor
B. p-n-p transistor
C. either of these
D. none of these
5 The basic circuit element in A.C. circuits are:
A. Resistor and capacitor
B. Resistor and Inductor
C. Capacitor only
D. Both (B) and (C)
6 Which one of the following Electro-magnetic wave have the highest frequency and shortest wave-length
A. X-rays
B. Ultraviolet rays
C. y-rays
D. Cosmic rays
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 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
A. 2nd group
B. fourth group
C. fifth group
D. sixth group
9 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
10 During the positive half-cycle in the half-wave rectification,the diode
A. does not conduct
B. conducts
C. either of these
D. neither of these

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