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

The waveform of alternating voltage is a:

Question # 2

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

Question # 3

Alternating current can be transmitted:

Question # 4

For normal operation of transistor, the batteries

Question # 5

The total reactance of a series RLC circuit at resonance is

Question # 6

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

Question # 7

Alternating current can induce voltage because it has a

Question # 8

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

Question # 9

The closed loop gain of the non-inverting amplifier is given by

Question # 10

In an A.C circuit with resistor only, the current and voltage have a phase angle of

Question # 11

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

Question # 12

Electromagnetic waves transmit energy equal to

Question # 13

Which one of the following waves belongs to electromagnetic spectrum

Question # 14

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

Question # 15

The Instantaneous value of alternative current maybe:

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ECAT Physics Chapter 16 Important MCQ's

Sr.# Question Answer
1 In a normally biased n-p-n transistor, an electron c current IEflows from the
A. emitter into the base
B. collector into the base
C. base into collector
D. none of these
2 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
3 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
4 A P-N juction or semiconductor diode cannot be used as
A. A rectifier
B. Detector
C. Oscillator
D. An amplifier
5 The open loop gain of OP-AMP is of the order of
A. 102
B. 103
C. 104
D. 105
6 A signal is amplified at the output without any change of phase, if it is applied at the
A. inverting input
B. non-inverting input
C. at any of the input
D. none of these
7 To design a resonant circuit of frequency 100 KHz with an inductor of inductance 5 mH, we need a capacitor of capacitance
A. 5.07 pF
B. 50 pF
C. 0.507 pF
D. 507 pF
8 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
9 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
10 The sum of positive and negative peak values is called:
A. Instantaneous value
B. Peak value
C. Rms valuie
D. Peak-to peak-value

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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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