ECAT Pre Computer Science Chapter 16 MCQ Test With Answer

MCQ's Test For ECAT Physics Chapter 16 Alternating Current

Try The MCQ's Test For ECAT Physics Chapter 16 Alternating Current

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ECAT Physics Chapter 16 Alternating Current

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Question # 1

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

Question # 2

The value of output resistance of OP-AMOP is of the order of

Question # 3

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

Question # 4

The power factor of resonant series circuit is

Question # 5

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

Question # 6

The emitter-base junction of a transistor is forward-biased and collector-base junction is reverse-biased. If the base current is increased, its

Question # 7

A diode characteristic curve is a plot between

Question # 8

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

Question # 9

At resonance, the phase angle for RLC series resonance circuit equals

Question # 10

A sinusoidally alternating voltage or current can be graphically represented by a:

Question # 11

The device which allows only the flow of an A.C. through a circuit is

Question # 12

In a normally biased n-p-n transistor, an electron c current IEflows from the

Question # 13

SI unit of impedance is

Question # 14

In RLC series circuit, resonance occurs when

Question # 15

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

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ECAT Physics Chapter 16 Important MCQ's

Sr.# Question Answer
1 OP-AMP has the following input terminals
A. one
B. two
C. three
D. four
2 The bridge circuit of full wave rectification uses
A. one diode
B. two diode
C. three diode
D. four diode
3 Alternating current can induce voltage because it has a
A. High peak value
B. Varying magnetic field
C. Stronger field than direct curren
D. Constant magnetic field
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 For the normal operation of the transistor, its
A. emitter-base and collector base junctions are forward biased
B. emitter-base junction is reversed biased and collector base junction is forward biased
C. emitter-base junction is forward biased and collector-base junction is reverse biased
D. any one of these
6 The magnitude of alternative voltage V:
A. Always increase
B. Always decrease
C. Remains constant
D. Does not remain constant
7 An A.C varies as a function of
A. Current
B. Voltage
C. Time
D. Charge
8 If we connect a A.C. volt meter to read A.C. voltage, It would read its:
A. RMS value
B. Instantaneous value
C. Valued average over a cycle
D. Zero
9 When the p-n junction is forward biased its resistance is of the order of
A. few mega ohms
B. few kilo ohms
C. few ohms
D. few milli ohms
10 The value of output resistance of OP-AMOP is of the order of
A. few ohms
B. few hundred ohms
C. several kilo ohms
D. several mega ohms

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  • Iiqra Fatima

    Iiqra Fatima

    25 May 2018

    You should let us practice difficult mcqs ..These are too easy for ECAT level....Thanku

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