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

For normal operation of transistor, the batteries

Question # 2

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

Question # 3

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

Question # 4

In which of the following diodes when an electron combines with a hole during the forward biasing, photon of visible light is emitted.

Question # 5

The open loop gain of OP-AMP is of the order of

Question # 6

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

Question # 7

The RMS value of alternating current is:

Question # 8

Which one of the following waves belongs to electromagnetic spectrum

Question # 9

The bridge circuit of full wave rectification uses

Question # 10

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

Question # 11

A changing magnetic flux creates around itself

Question # 12

A signal is amplified at the output without any change of phase, if it is applied at the

Question # 13

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

Question # 14

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

Question # 15

A P-N juction or semiconductor diode cannot be used as

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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 time interval during which the Voltage source changes its polarity once is known as:
A. Time period T
B. Half the time period
C. Quarter the time period
D. Two third of the time period
3 The value of current gain of n-p-n transistor is of the order of
A. tens
B. hundreds
C. thousands
D. ten thousands
4 In describing functions of digital systems, a closed switch will be shown as
A. 0
B. 1
C. low
D. any one 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 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
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 Which of the following diodes can operate in the reverse biased condition
A. photo diode
B. light emitting diode
C. photo voltaic cell
D. none of these
9 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
10 In which of the following diodes when an electron combines with a hole during the forward biasing, photon of visible light is emitted.
A. photo diode
B. light emitting diode
C. photo voltaic cell
D. all of them

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