10th Class Physics Chapter 7 Basic Electronics Short Question Answer

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10th Class Physics Chapter 7 Basic Electronics Short Question Answer

How digital electronic devices work?

How digital electronic devices work?

Answer : Digital electronics devices store and process bites electronically.
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Give the examples of cathode ray tubes from you daily life?

Give the examples of cathode ray tubes from you daily life?

Answer : The picture in our T.V. set and display terminal of most computes are cathode ray tubes.
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Name two factors which can enhance thermionic emission?

Name two factors which can enhance thermionic emission?

Answer : i. Increasing strength of the battery and voltage.
ii. By increasing temperature.
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What are digital quantities?

What are digital quantities?

Answer : Digital quantities. Quantities whose values vary in non-continuous manner are called digital quantities. Digital quantities are expressed in form of digits or numbers.
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In oscilloscope how filament is heated.

In oscilloscope how filament is heated.

Answer : In oscilloscope filament is heated electrically. When filament is connected to voltage source, current passes through filament and get heated.
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What are the values of Boolean variables?

What are the values of Boolean variables?

Answer : Boolean variables can have only two values 0 and 1
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What is meant by Boolean algebra?

What is meant by Boolean algebra?

Answer : It is a branch of mathematics which deals with the relationships of logic variables.
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Define analogy quantities.

Define analogy quantities.

Answer : Quantities whose values very in continuously or remain constant are known as analogue quantities.
Example: Temperature, time, pressure, distance and analogue quantities.
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Name some use of oscilloscope.

Name some use of oscilloscope.

Answer : i. Displaying wave forms.
ii. Range finding
iii. Measuring voltages.
iv. Echo sounding.
v. Displaying heartbeats.
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Write some benefits of using digital electronic over analogue electronic.

Write some benefits of using digital electronic over analogue electronic.

Answer : i. There is no interference in digital signal
ii. Its easy to read digital quantities.
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What is the use of grid in cathode ray oscilloscope?

What is the use of grid in cathode ray oscilloscope?

Answer : In the electron gun the grid is used to control the flow of electron, thus control brightness on fluorescent screen.
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NAND gate is the reciprocal of AND gate discuss.

NAND gate is the reciprocal of AND gate discuss.

Answer : NAND gate is formed when 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.
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What is cathode ray oscilloscope?

What is cathode ray oscilloscope?

Answer : An instrument which is used to display the magnitude of rapidly changing electric current or potential.
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What is a cathode ray tube?

What is a cathode ray tube?

Answer : A vacuum tube used to accelerate electrons which emit from the cathode by applying high voltage between cathode and anode is called ray tube.
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What is the use of electron gun?

What is the use of electron gun?

Answer : It is used to investigate the properties of electron beam.
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Why filament is heated.

Why filament is heated.

Answer : Filament is heated for emission of electrons. If metal is heated to a high temperature, some of free electrons may gain sufficient energy to escape metal surface.
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Explain the uses of logic gates.

Explain the uses of logic gates.

Answer : 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.
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Why a large potential is applied between anode and cathode.

Why a large potential is applied between anode and cathode.

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