10th Class Physics Chapter 7 Short Questions with Answers Solved

Question: 1

What is the use of grid in cathode ray oscilloscope.

Answer: 1

1-18

In the electron gun the grid is used to control the flow of electron, thus control brightness on fluorescent screen.

Question: 2

Explain the uses of logic gates.

Answer: 2

2-18

Logic gates in electronic circuits are used to do useful tasks. These circuits usually use light depending resistors to keep inputs LOW. an LDR can act as a switch that is closed when illuminated by light and open in dark.

Question: 3

How digital electronic devices work.

Answer: 3

3-18

Digital electronics devices store and process bites electronically.

Question: 4

What are the values of Boolean variables.

Answer: 4

4-18

Boolean variables can have only two values 0 and 1

Question: 5

What are digital quantities.

Answer: 5

5-18

Digital quantities. Quantities whose values vary in non continuous manner are called digital quantities. Digital quantities are expressed in form of digits or numbers.

Question: 6

In oscilloscope how filament is heated.

Answer: 6

6-18

In oscilloscope filament is heated electrically. When filament is connected to voltage source, current passses through filament and get heated.

Question: 7

Write some benefits of using digital electronic over analogue electronic.

Answer: 7

7-18

i. There is no interference in digital signal

ii. Its easy to read digital quantities.

Question: 8

Name two factors which can enhance thermionic emission .

Answer: 8

8-18

i. Increasing strength of the battery and voltage.

ii. By increasing temperature.

Question: 9

What is meant by Boolean algebra?

Answer: 9

9-18

It is a branch of mathematics which deals with the relationships of logic variables.

Question: 10

Give the examples of cathode ray tubes from yu daily life.

Answer: 10

10-18

The picture in our T.V. set and display terminal of most computes are cathode ray tubes.

Question: 11

Define analogy quantities.

Answer: 11

11-18

quantities whose values very in continuously or remain constant are known as analogue quantities.

Example: Temperature, time, pressure, distance and analogue quantities.

Question: 12

What is cathode ray oscilloscope?

Answer: 12

12-18

An instrument which is used to display the magnitude of rapidly changing electric current or potential.

Question: 13

What is a cathode ray tube?

Answer: 13

13-18

A vacuum tube used to accelerate electrons which emit from the cathode by applying high voltage between cathode and anode is called ray tube.

Question: 14

What is the use of electron gun.

Answer: 14

14-18

It is used to investigate the properties of electron beam.

Question: 15

Why a large potential is applied between anode and cathode.

Answer: 15

15-18

A large potential is applied between anode and cathode to accelerate the beam of electrons.

Question: 16

NAND gate is the reciprocal of AND gate discuss.

Answer: 16

16-18

NAND gate is formed when AND and NOT gate are connected one after the other .If AND gate show 0 output, then NAND gate will show 1 output. So we can say NAND agate is reciprocal of AND gate.

Question: 17

Why filament is heated.

Answer: 17

17-18

Filament is heated for emission of electrons. If metal is heated to a high temperature, some of free electrons may gain sufficient energy to erscape metal surface.

Question: 18

Name some use of oscilloscope.

Answer: 18

18-18

i. Displaying wave forms.

ii. Range finding

iii. Measuring voltages.

iv. Echo sounding .

v. Displaying heartbeats.

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10th Class Chapter 7 Physics Short Questions

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