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

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

Question # 3

The Instantaneous value of alternative current maybe:

Question # 4

The closed loop gain of the inverting amplifier is written as

Question # 5

Alternating current can induce voltage because it has a

Question # 6

Alternating current can be transmitted:

Question # 7

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

Question # 8

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

Question # 9

The bridge circuit of full wave rectification uses

Question # 10

For a n-p-n transistor, the conventional current equation can be written as

Question # 11

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

Question # 12

A p-n junction is formed when a crystal of silicon is growth in such a way that its one half is doped with trivalent impurity and the other half with a impurity from

Question # 13

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

Question # 14

Most OP-AMP operates with

Question # 15

If we connected the ordinary DC ammeter to measure alternating current, it would measure its:

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ECAT Physics Chapter 16 Important MCQ's

Sr.# Question Answer
1 Which one of the following Electro-magnetic wave have the highest frequency and shortest wave-length
A. X-rays
B. Ultraviolet rays
C. y-rays
D. Cosmic rays
2 The value of the potential difference across the depletion region for the case of germanium is
A. 0.3 V
B. 0.5 V
C. 0.7 V
D. 0.9 V
3 An A.C varies as a function of
A. Current
B. Voltage
C. Time
D. Charge
4 The basic circuit element in D.C. circuit is:
A. A capacitor
B. A resistor
C. An inductor
D. Both (A) and (C)
5 The sum of positive and negative peak values is called:
A. Instantaneous value
B. Peak value
C. Rms valuie
D. Peak-to peak-value
6 Which of the following has a great concentration of impurity
A. base
B. emitter
C. collector
D. none of these
7 Unless stated otherwise, when we speak of A.C. meter reading, we usualy mean:
A. Peak value
B. RMS value
C. Instantaneous value
D. Peak-to-peak value
8 The highest value reached by the voltage or current:
A. In quarter cycle is called Instantaneous value
B. In half cycle is called peak-to-peak value
C. In one cycle is called peak value
D. In half cycle is called Instantaneous value
9 OP-AMP has the following input terminals
A. one
B. two
C. three
D. four
10 If 250V is the RMS value of alternative voltage, then its peak value Vowill be:
A. 353.5V
B. 250V
C. 175V
D. zero

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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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