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

For normal operation of transistor, the batteries

Question # 2

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

Question # 3

During the positive half-cycle in the half-wave rectification,the diode

Question # 4

The total reactance of a series RLC circuit at resonance is

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

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

Question # 7

The closed loop gain of the inverting amplifier is written as

Question # 8

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

Question # 9

SI unit of impedance is

Question # 10

Transmitting antenna emits

Question # 11

The output voltage of half wave rectification is in the form of

Question # 12

The basic circuit element in D.C. circuit is:

Question # 13

Which one of the following waves belongs to electromagnetic spectrum

Question # 14

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

Question # 15

The r.m.s. value of alternating current is equal to its maximum value at angle of

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ECAT Physics Chapter 16 Important MCQ's

Sr.# Question Answer
1 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
2 The bridge circuit of full wave rectification uses
A. one diode
B. two diode
C. three diode
D. four diode
3 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
4 Transmitting antenna emits
A. Magnetic waves
B. Electric waves
C. Electromagnetic waves
D. Sound waves
5 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
6 A diode characteristic curve is a plot between
A. current and time
B. voltage and time
C. voltage and current
D. forward voltage and reversed voltage
7 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
8 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
9 An A.C. voltmeter read 250 volts. The frequency of alternating is 50 Hz, the peak value of voltage is
A. 3525.0 volts
B. 35.35 volts
C. 353.5 volts
D. 3.535 volts
10 OP-AMP has the following input terminals
A. one
B. two
C. three
D. four

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