9th Class English Medium Physics Chapter 9 Transfer of Heat Short Questions With Answers

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Online Short Questions For Chapter 9 "9th Class Physics English Medium Chapter 9 Preparation "

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Physics (New Book) - 9th Class Physics English Medium Chapter 9 Preparation

Question # 1

Described an experiment of convection.

Ans 1: Taken a beaker and fill two third of it with water Heat the beaker by keeping a burner below it Drop two or three crystals of potassium permanganate in the water It will be seen that cultured streaks of water formed by crystals move upward above the flame and then move downward from side ways. These coloured streaks show the path of currents of liquid

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Prepare Complete Set Wise Questions For Chapter 9 "9th Class Physics English Medium Chapter 9 Preparation "

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Set 9

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9th Class Physics English Medium Chapter 9 Preparation - Set 1

Question # 1

Described an experiment of convection.

Ans 1: Taken a beaker and fill two third of it with water Heat the beaker by keeping a burner below it Drop two or three crystals of potassium permanganate in the water It will be seen that cultured streaks of water formed by crystals move upward above the flame and then move downward from side ways. These coloured streaks show the path of currents of liquid

Submit

9th Class Physics English Medium Chapter 9 Preparation - Set 2

Question # 1

Described an experiment of convection.

Ans 1: Taken a beaker and fill two third of it with water Heat the beaker by keeping a burner below it Drop two or three crystals of potassium permanganate in the water It will be seen that cultured streaks of water formed by crystals move upward above the flame and then move downward from side ways. These coloured streaks show the path of currents of liquid

Submit

9th Class Physics English Medium Chapter 9 Preparation - Set 3

Question # 1

Describe relation of radiation of heat and surface area

Ans 1: Transfer of heat by radiation is also affected by the surface area of the body emitting or absorbing heat larger is the area, greater will be the transfer of heat.

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9th Class Physics English Medium Chapter 9 Preparation - Set 4

Question # 1

Where is convection currents used

Ans 1: Uses of convection currents: Convection currents set up by electric, gas or coal heaters help to warm our homes and offices.
Central heating systems in buildings work on the same principle by convection,.
The day-to-day temperature changes in the atmosphere result from the circulation of warm or cold air that travels across the region
Land and sea breeze are also the examples of convection current

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9th Class Physics English Medium Chapter 9 Preparation - Set 5

Question # 1

Why metal are good conductors of heat?

Ans 1: Metals are good conductors of heat because they have free electrons. These free electrons move with very high velocities within the metals. They carry energy at a very fast rate from hot to cold parts of object.

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9th Class Physics English Medium Chapter 9 Preparation - Set 6

Question # 1

Transfer of Heat.

Ans 1: Thermal energy from a hot body flows to a cold body in the form of heat. This is called as transfer of heat .

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9th Class Physics English Medium Chapter 9 Preparation - Set 7

Question # 1

What is meant by global warming

Ans 1: Global warming: An increase in the average temperature of Earth by trapping more heat due to greenhouse effect effect is called global warming
Ans 2: Cause of Global warming: The man cause of global warming is the percentage increment in the carbon dioxide gas in atmosphere

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9th Class Physics English Medium Chapter 9 Preparation - Set 8

Question # 1

Why metal are good conductors of heat?

Ans 1: Metals are good conductors of heat because they have free electrons. These free electrons move with very high velocities within the metals. They carry energy at a very fast rate from hot to cold parts of object.

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9th Class Physics English Medium Chapter 9 Preparation - Set 9

Question # 1

Define convection current in air

Ans 1: Gases also expand on heating, thus convection currents are easily set up due to differences is the densities of air at various parts in atmosphere Or Transfer of heat by movement of heated partials into an area of cooler fluid

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9th class Physics Chapter 9 (English Medium)

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Matric Part 1/9th Class Physics Chapter 9 Short Question Test With Answer for Unit 9 Transfer of Heat

9th Class English Medium Subjects

9th Class Urdu Medium Subjects

Online Short Questions For Chapter 9 "9th Class Physics English Medium Chapter 9 Preparation "

Physics (New Book) - 9th Class Physics English Medium Chapter 9 Preparation

Described an experiment of convection.

Which measures are taken to save energy

We wear whit and light coloured clothes in summer why

Explain the impact of greenhouse effect in global

What is greenhouse effect?

Write any twoi factor on which rate of flow of heat depends

What is the effect of length of the solid on thermal conductivity

Define convection

What is meant by convection currents

Why we avoid wear dark colure dresses in summer season

Prepare Complete Set Wise Questions For Chapter 9 "9th Class Physics English Medium Chapter 9 Preparation "

Set 1

Set 2

Set 3

Set 4

Set 5

Set 6

Set 7

Set 8

Set 9

9th Class Physics English Medium Chapter 9 Preparation - Set 1

Described an experiment of convection.

Which measures are taken to save energy

We wear whit and light coloured clothes in summer why

Explain the impact of greenhouse effect in global

What is greenhouse effect?

Write any twoi factor on which rate of flow of heat depends

What is the effect of length of the solid on thermal conductivity

Define convection

What is meant by convection currents

Why we avoid wear dark colure dresses in summer season

9th Class Physics English Medium Chapter 9 Preparation - Set 2

Described an experiment of convection.

How does heat reaches us from the sun?

We wear whit and light coloured clothes in summer why

Describe relation of radiation of heat and surface area

When does an object is radiating more heat than it is absorbing

Why metal are good conductors of heat?

Define sea breeze, how it is cause?

Define convection

On which factors does rate of heat flow depends upon?

What is thermal conductivity

9th Class Physics English Medium Chapter 9 Preparation - Set 3

Describe relation of radiation of heat and surface area

Define conduction with example.

What is Leslie's cube

Write two uses of non-conductors

Why interior surface of pots made polished

Why are the metals good conductors of heat

Differentiate between conduction and convection.

What is meant by transfer of heat

Explain the impacted of treehouse effect in global warming

Explain why

9th Class Physics English Medium Chapter 9 Preparation - Set 4

Where is convection currents used

How various surfaces can be compared by a Lessie cube

Write the name some bad conductors.

Write any two measures to save energy

For what purpose double glazed windows are used.

Define convection

What is meant by convection currents

How heat energy from the sun reach to earth

What is thermal conductivity

What is green house effect

9th Class Physics English Medium Chapter 9 Preparation - Set 5

Why metal are good conductors of heat?

Why conduction of heat does not take place in gases

Differentiate between conduction and convection.