ECAT Pre Engineering Physics Chapter 16 MCQ Test With Answer

MCQ's Test For Physics ECAT Pre Engineering Chapter 16 Alternating Current

Try The MCQ's Test For Physics ECAT Pre Engineering Chapter 16 Alternating Current

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Physics ECAT Pre Engineering Chapter 16 Alternating Current

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Question # 1

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

Question # 2

When the pn-junction is in reversed biased, current flows through the junction due to the

Question # 3

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

Question # 4

Which one of the following waves belongs to electromagnetic spectrum

Question # 5

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 # 6

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

Question # 7

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

Question # 8

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

Question # 9

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

Question # 10

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

Question # 11

For normal operation of transistor, the batteries

Question # 12

Which of the following diodes can operate in the reverse biased condition

Question # 13

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

Question # 14

In series RC circuit when R=Xc, then the phase angle 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 series RC circuit when R=Xc, then the phase angle is
A. 0°
B. 90°
C. 70°
D. 45°
2 Conversion of alternating current into direct current is called
A. amplification
B. rectification
C. conduction
D. polarization
3 The average of A.C. current and voltage over a complete cycle is
A. Maximum
B. zero
C. Neither zero nor maximum
D. None of these
4 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
5 Mathematical manipulation of the two quantized states can be best carried if they are represented by
A. high - low
B. yes - no
C. on - off
D. 0 - 1
6 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
7 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
8 In an A.C circuit with resistor only, the current and voltage have a phase angle of
A. 90°
B. 0°
C. 180°
D. none of these
9 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
A. 2nd group
B. fourth group
C. fifth group
D. sixth group
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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