ECAT Pre General Science Physics Chapter 18 Electronics

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  • Chapter NameCh 18 - Electronics

ECAT Pre General Science Physics Chapter 18 Electronics

  • Total Questions30

  • Time Allowed30

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ECAT Pre General Science Physics Chapter 18 Electronics

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Question # 1

To make an LED, it is impreacticable to use:

Question # 2

An electronic computer is basically a vast arrangement of electronic switches which are made from

Question # 3

The number of LED'S needed to display all the digits is:

Question # 4

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

Question # 5

In a transistor, collector current is controlled by

Question # 6

The values 1 and 0 are designated as:

Question # 7

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

Question # 8

In AND gate, the output is 1 if:

Question # 9

The value of LDR depends upon intensity of:

Question # 10

A potential barrier of 0.7 V exists across p-n junction made from:

Question # 11

Computer chips are made from:

Question # 12

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

Question # 13

A diode which can turn its current ON and OFF in nono seconds is called:

Question # 14

To turn the transistor OFF, the base current is set:

Question # 15

.Depletion region contains:

Question # 16

In full wave rectification, simultaneous action is that:

Question # 17

The value of relative permittivity of different dielectrics are

Question # 18

If both the inputs given to a gate ae 1 such that the output is 0, then it is:

Question # 19

Field lines are closer to each other in the region where the filed is

Question # 20

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

Question # 21

In an N-type silicon, which of the following statement is true

Question # 22

In reverse-biased p-n junction, the reverse current is due to flow of:

Question # 23

To display a digit of EIGHT, the number of ON LED'S are:

Question # 24

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

Question # 25

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

Question # 26

In describing function of digital systems, 1 represents:

Question # 27

A transistor has:

Question # 28

By placing a dielectric in between the charges, the electrostatic force between them

Question # 29

The intensity at a point due to a charge is inversely proportional to

Question # 30

Improper biasing of a transistor circuit produces

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