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

Question # 2

The magnitude of alternative voltage V:

Question # 3

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

Question # 4

Nowadays, Most of the electric energy is produced by the A.C. generators using:

Question # 5

When a transistor is used as a switch the circuit in which the current is to be switched OFF and ON, is connected between the

Question # 6

OP-AMP has the following input terminals

Question # 7

The impedance of RLC series resonance circuit at resonant frequency is

Question # 8

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

Question # 9

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

Question # 10

At resonance frequency the impedance of parallel resonance circuit is

Question # 11

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

Question # 12

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

Question # 13

The basic circuit element in D.C. circuit is:

Question # 14

Mathematical manipulation of the two quantized states can be best carried if they are represented by

Question # 15

Transmitting antenna emits

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ECAT Physics Chapter 16 Important MCQ's

Sr.# Question Answer
1 The circuit which is used to smooth the output voltage of the full-wave rectification is known as
A. transformer
B. rectifier
C. filter
D. none of these
2 The basic circuit elements of A.C circuit are
A. Resistor
B. Inductor
C. Capacitor
D. All the three
3 The total reactance of a series RLC circuit at resonance is
A. zero
B. Equal to the resistance
C. Infinity
D. Capacitive
4 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
5 When the emitter-base junction of a transistor is reverse biased, collector current
A. Reverses
B. Increases
C. Decreases
D. Stops
6 For a n-p-n transistor, the conventional current equation can be written as
A. IE+ IC= IB
B. IC- IB= IE
C. IC+ IB= IE
D. IB+ IE= IC
7 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
8 The value of current gain of n-p-n transistor is of the order of
A. tens
B. hundreds
C. thousands
D. ten thousands
9 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
10 During the positive half-cycle in the half-wave rectification,the diode
A. does not conduct
B. conducts
C. either of these
D. neither of these

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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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