ECAT Pre Computer Science Chapter 18 MCQ Test With Answer

MCQ's Test For ECAT Physics Chapter 18 Electronics

Try The MCQ's Test For ECAT Physics Chapter 18 Electronics

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ECAT Physics Chapter 18 Electronics

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Question # 1

A hole in p-type my be due to:

Question # 2

The number of input terminals of an op-amp is:

Question # 3

An LED emits light when it is:

Question # 4

The use of chips in electrons is described in the form of:

Question # 5

When transistors are used in digital circuits they usually operate in the

Question # 6

To designate the voltage as low or 0 by a logic gate, the specified minimum value is:

Question # 7

If the distance between two charges is doubled, the force between them will become

Question # 8

In the text book, the transistor amplifier circuit is a:

Question # 9

Crystal of germanium or silicon in its pure form at absolute zero acts as:

Question # 10

In AND gate, the output is 1 if:

Question # 11

The reverse saturation current in a PN junction diode is only due to

Question # 12

Majority charge carriers in the p-region of p-n junction are:

Question # 13

The value of relative permittivity of different dielectrics are

Question # 14

The value of LDR depends upon intensity of:

Question # 15

All the valence electrons present in a crystal of silicon are bound in their orbits by

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ECAT Physics Chapter 18 Important MCQ's

Sr.# Question Answer
1 To display a digit of EIGHT, the number of ON LED'S are:
A. Two
B. Three
C. Five
D. Seven
2 Truth table of logic function:
A. Summarizes its output values
B. Tabulates all its input conditions only
C. Display all its input/output possibilites
D. Is not based on logic algebra
3 Whenever a covalent bond breaks, it creates:
A. An electron
B. A hole
C. An electron-hole pair
D. A positron
4 All the valence electrons present in a crystal of silicon are bound in their orbits by
A. Ionic bond
B. covalent bond
C. Molecular bond
D. Both (A) and (B)
5 The electric field lines start from
A. Positive charge
B. Negative charge
C. Either A or B
D. Neutron
6 The SI unit of charge is
A. Ampere
B. Watt
C. Coulomb
D. Volt
7 To make an LED, it is impreacticable to use:
A. Silicon
B. Gallium arsenide
C. Gallium arsenide phosphide
D. Iron
8 The intensity at a point due to a charge is inversely proportional to
A. Amount of charge
B. Size of the charge
C. Distance between charge and the point
D. Square of the distance from the charge
9 Majority charge carriers in the p-region of p-n junction are:
A. electrons
B. positrons
C. Holes
D. Neutrons
10 Improper biasing of a transistor circuit produces
A. Heavy loading of emitter current
B. Distortion in the output signal
C. Excessive heat at collector terminal
D. Faulty location of load line

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