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 phase angle of a series RLC circuit at resonance is

Question # 2

In RLC series circuit, resonance occurs when

Question # 3

Average value of A.C voltage during one cycle is

Question # 4

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

Question # 5

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

Question # 6

When the pn-junction is connected reversed biased, its resistance is of the order of

Question # 7

A P-N juction or semiconductor diode cannot be used as

Question # 8

Conversion of alternating current into direct current is called

Question # 9

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

Question # 10

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

Question # 11

If we connect a A.C. volt meter to read A.C. voltage, It would read its:

Question # 12

In which of the following components, pn-junction is used

Question # 13

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

Question # 14

For a n-p-n transistor, the conventional current equation can be written as

Question # 15

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

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ECAT Physics Chapter 16 Important MCQ's

Sr.# Question Answer
1 A signal appears after amplification, at the output terminal with a phase shift of 180° , if it is applied at
A. inverting input
B. non-inverting input
C. any one of the input terminal
D. none of them
2 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
3 During each cycle, alternating voltage reaches a peak value
A. One time
B. Two times
C. Four times
D. A number of times depending on the frequency
4 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
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 phase angle of a series RLC circuit at resonance is
A. 180°
B. 90°
C. 0°
D. None of the these
7 The r.m.s. value of alternating current is equal to its maximum value at angle of
A. 60°
B. 45°
C. 30°
D. 90°
8 The power factor of resonant series circuit is
A. 1
B. 0
C. -1
D. 0.5
9 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
10 Which of the following diode is used to derive the current in external circuit when light is incident in the circuit
A. photo diode
B. light emitting diode
C. photo voltaic cell
D. none of these

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