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

Question # 2

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

Question # 3

Alternating current can induce voltage because it has a

Question # 4

The input resistance of the OP-AMP is the resistance between the

Question # 5

To design a resonant circuit of frequency 100 KHz with an inductor of inductance 5 mH, we need a capacitor of capacitance

Question # 6

In frequency modulation (FM), the carrier waves amplitude

Question # 7

The RMS value of alternating current is:

Question # 8

At resonance, the impedance of RLC series circuit is

Question # 9

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

Question # 10

The circuit which is used to smooth the output voltage of the full-wave rectification is known as

Question # 11

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

Question # 12

An A.C. voltmeter read 250 volts. The frequency of alternating is 50 Hz, the peak value of voltage is

Question # 13

During each cycle, alternating voltage reaches a peak value

Question # 14

SI unit of impedance is

Question # 15

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

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ECAT Physics Chapter 16 Important MCQ's

Sr.# Question Answer
1 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
2 A resonance curve for RLC series circuit is a plot of frequency versus
A. Voltage
B. Current
C. Impedance
D. Reactance
3 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
4 The RMS value of alternating current is:
A. 0.7 times at the peak value
B. 0.5 times the peak value
C. 0.7 times the Instantaneous value
D. Equal to maximum voltage
5 The closed loop gain of the inverting amplifier is written as
A. G = R2/R1
B. G = 1 + R2/R1
C. G = -R2/R1
D. G = 1 - R2/R1
6 In RLC series circuit, resonance occurs when
A. XL > Xc
B. XL < Xc
C. XL = Xc
D. None of these
7 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
8 The basic circuit element in D.C. circuit is:
A. A capacitor
B. A resistor
C. An inductor
D. Both (A) and (C)
9 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
10 The most common source of alternating voltage is:
A. Motor
B. Transformer
C. AC genrator
D. Both (A) and (C)

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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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