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 length of rotating vector (on a certain scale) represents the:

Question # 2

Alternating current can induce voltage because it has a

Question # 3

Which one of the following is correct?

Question # 4

In series RC circuit when R=Xc, then the phase angle is

Question # 5

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

Question # 6

During each cycle, alternating voltage reaches a peak value

Question # 7

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

Question # 8

A resonance curve for RLC series circuit is a plot of frequency versus

Question # 9

The r.m.s. value of alternating current is equal to its maximum value at angle of

Question # 10

Transmitting antenna emits

Question # 11

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

Question # 12

Peak value of alternative current is:

Question # 13

The total reactance of a series RLC circuit at resonance is

Question # 14

The entire wave form of sinusoidal voltage is actually a set of all the:

Question # 15

Electromagnetic waves transmit energy equal to

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ECAT Physics Chapter 16 Important MCQ's

Sr.# Question Answer
1 In a transistor, if the central region is p-type then this type of transistor is known as
A. p-n-p transistor
B. n-p-n transistor
C. either of these
D. none of these
2 Conversion of alternating current into direct current is called
A. amplification
B. rectification
C. conduction
D. polarization
3 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
4 During each cycle, alternating voltage reaches a peak value
A. One time
B. Two times
C. Four times
D. A number of times depending on the frequency
5 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
6 An A.C varies as a function of
A. Current
B. Voltage
C. Time
D. Charge
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 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 When electrons in the transmitting antenna vibrate 94000 time per second, they produce radiowaves having frequency
A. 9.4 kHz
B. 940 kHz
C. 94 kHz
D. None of these
10 Transmitting antenna emits
A. Magnetic waves
B. Electric waves
C. Electromagnetic waves
D. Sound waves

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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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