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

OP-AMP has the following input terminals

Question # 2

The alternative voltage of current is actually measured by:

Question # 3

In free space, the speed of electromagnetic waves is

Question # 4

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 # 5

An A.C. voltmeter read 250 volts. The frequency of alternating is 50 Hz, the peak value of voltage is

Question # 6

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

Question # 7

The wave form of alternating voltage is the graph between:

Question # 8

Which one of the following waves belongs to electromagnetic spectrum

Question # 9

In a transistor, if the central region is n-type, then this type of transistor is known as

Question # 10

When electrons in the transmitting antenna vibrate 94000 time per second, they produce radiowaves having frequency

Question # 11

In frequency modulation (FM), the carrier waves amplitude

Question # 12

When the p-n junction is forward biased its resistance is of the order of

Question # 13

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

Question # 14

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

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 highest value reached by the voltage or current:
A. In quarter cycle is called Instantaneous value
B. In half cycle is called peak-to-peak value
C. In one cycle is called peak value
D. In half cycle is called Instantaneous value
2 The impedance of RLC series resonance circuit at resonant frequency is
A. Greater than R
B. Equal to R
C. Less than R
D. None of these
3 In a normally biased n-p-n transistor, an electron c current IEflows from the
A. emitter into the base
B. collector into the base
C. base into collector
D. none of these
4 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
5 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
6 The length of rotating vector (on a certain scale) represents the:
A. Peak value of alternating quantity
B. RMS value of alternating quantity
C. Instantaneous value of alternating quantity
D. Either (B) or (C)
7 The amplifier which us used to perform mathematical operations electronically is known as
A. calculator
B. OP-AMP
C. computer
D. any one of them
8 The bridge circuit of full wave rectification uses
A. one diode
B. two diode
C. three diode
D. four diode
9 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)
10 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

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