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 highest value reached by the voltage or current:

Question # 2

At higher frequency of the alternating current, the capacitive reactance Xc

Question # 3

If the value of C in a series RLC circuit is increased, the resonant frequency

Question # 4

In a transistor, the central region is called

Question # 5

If 250V is the RMS value of alternative voltage, then its peak value Vowill be:

Question # 6

The alternative voltage of current is actually measured by:

Question # 7

At resonance, the impedance of RLC series circuit is

Question # 8

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

Question # 9

When the emitter-base junction of a transistor is reverse biased, collector current

Question # 10

SI unit of impedance is

Question # 11

A signal is amplified at the output without any change of phase, if it is applied at the

Question # 12

A diode characteristic curve is a plot between

Question # 13

The sum of positive and negative peak values is called:

Question # 14

At resonance frequency the impedance of parallel resonance circuit is

Question # 15

The open loop gain of OP-AMP is of the order of

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ECAT Physics Chapter 16 Important MCQ's

Sr.# Question Answer
1 A digital system deals with quantities or variables which have
A. only one state
B. only two discrete states
C. three discrete states
D. four discrete states
2 The device which allows only the flow of an A.C. through a circuit is
A. Capacitor
B. Inductor
C. D.C. motor
D. Battery
3 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
4 When the emitter-base junction of a transistor is reverse biased, collector current
A. Reverses
B. Increases
C. Decreases
D. Stops
5 Peak value of alternative current is:
A. one of its Instantaneous value
B. Equal to its RMS value
C. The same as its peak-to-peak value
D. Both (B) and (C)
6 If we connected the ordinary DC ammeter to measure alternating current, it would measure its:
A. Instantaneous value
B. RMS value
C. Value averaged over a cycle
D. Either (B) or (C)
7 OP-AMP has the following input terminals
A. one
B. two
C. three
D. four
8 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)
9 SI unit of impedance is
A. hertz
B. henry
C. ampere
D. ohms
10 In RLC series circuit, resonance occurs when
A. XL > Xc
B. XL < Xc
C. XL = Xc
D. None of these

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