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 basic circuit element in D.C. circuit is:

Question # 2

In a transistor, the central region is called

Question # 3

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

Question # 4

A signal appears after amplification, at the output terminal with a phase shift of 180° , if it is applied at

Question # 5

The value of the input resistance of OP-AMP is of the order of

Question # 6

The highest value reached by the voltage or current:

Question # 7

In n-p-n transistor, emitter base junction is kept

Question # 8

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

Question # 9

The sum of positive and negative peak values is called:

Question # 10

For the normal operation of the transistor, its

Question # 11

Alternating current can induce voltage because it has a

Question # 12

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

Question # 13

If we connected the ordinary DC ammeter to measure alternating current, it would measure its:

Question # 14

The total reactance of a series RLC circuit at resonance is

Question # 15

The value of the potential difference across the depletion region for the case of germanium is

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ECAT Physics Chapter 16 Important MCQ's

Sr.# Question Answer
1 The sum of positive and negative peak values is called:
A. Instantaneous value
B. Peak value
C. Rms valuie
D. Peak-to peak-value
2 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)
3 If 250V is the RMS value of alternative voltage, then its peak value Vowill be:
A. 353.5V
B. 250V
C. 175V
D. zero
4 The emitter-base junction of a transistor is forward-biased and collector-base junction is reverse-biased. If the base current is increased, its
A. Icwill decrease
B. VCEwill increase
C. ICwill increase
D. VCCwill increase
5 The Instantaneous value of alternative current maybe:
A. The same as its RMS value
B. Greater than its Rms value
C. The same as its peak value
D. Any of these
6 Due to the high value of the input resistance, practically, the value of the current which flows between the input terminals is
A. zero
B. small
C. large
D. very large
7 In n-p-n transistor, emitter base junction is kept
A. reversed
B. forward biased
C. may be reversed or may be forward biased
D. none of these
8 Which of the following diode is used for the detection of light
A. photo diode
B. light emitting diode
C. photo voltaic cell
D. all of them
9 When the pn-junction is in reversed biased, current flows through the junction due to the
A. majority carriers
B. minority carriers
C. either of them
D. none of them
10 SI unit of impedance is
A. hertz
B. henry
C. ampere
D. ohms

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