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

9th Class Physics Chapter 9 Online Preparation

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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

What is green house effect

Ans 1: Carbon dioxide and water in the atmosphere allow radiations of short wavelengths to pass through them easily but not long wavelengths of thermal radiations thus heat is trapped which increases the temperature This is alled green house effect.

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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 2

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Set 3

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Set 4

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Set 5

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Set 7

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Set 8

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Set 9

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

Question # 1

What is green house effect

Ans 1: Carbon dioxide and water in the atmosphere allow radiations of short wavelengths to pass through them easily but not long wavelengths of thermal radiations thus heat is trapped which increases the temperature This is alled green house effect.

Submit

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

Question # 1

How gliders stay in air for a long period

Ans 1: Gliders use upward movement of hot air. The rising convection currents are called thermal Glider ride over these thermals. The upward movement of air currents in thermals help them to stay in air for a long time

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

Question # 1

In a thermos flask, how heat is prevented to enter or leave the flask

Ans 1: This is done by suitable measure to reduce the transfer of heat due to conduction, conversion and radiation. Thus anything kept in it maintains its temperature for a long time.

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

Question # 1

Define thermals.

Ans 1: Glider pilots use upward movement of hot air currents due to convection of heat. These rising currents of hot air are called thermals.

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

Question # 1

Define radiation

Ans 1: Radiation: Radiation is the mode of transfer of heat from one place to another in the form of waves called electromagnetic waves
Radiation depends upon following three factors
Colour and texture of the surface
Surface temperature, Surface area

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

Question # 1

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

Ans 1: Length of the solid: Large is the length between the hot and cold ends of the solid more time it will take to conduct heat to the colder end and smaller ewill be the rate of flow of heat Thus

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

Question # 1

Explain the impacted of treehouse effect in global warming

Ans 1: Earth atmosphere contains Co2 and water vapors It causes greenhouse effect and thus retains the temperature of Earth by trapping more heat due to green house effect This phenomenon is called global warming.

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

Question # 1

What is greenhouse effect

Ans 1: When heat energy reflects from the earth surface, rays with shorter wavelength reflect back toward Sun but before all this radiation cn escape to outer space, greenhouse gases in the atmosphere absorb some of it which makes the atmosphere warmer and Earth surface also warmer This is called greenhouse effect

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

Question # 1

Define conduction with example.

Ans 1: Conduction: The mode of transfer of heat by vibrating atoms and free electrons in solids from hot to cold parts of a body is called conduction heat. Example: All metals are good conductors of heat.

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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

What is green house effect

Write difference between land breeze and sea breeze

Write the ways by which transfer of heat takes place

Define the of flow of heat and write its mathematical form.

What measures do you suggest to conserve energy in houses

Differentiate between conduction and convection.

Explain the impact of greenhouse effect in global

Write any two uses of conductors

What is thermal conductivity

How various surfaces can be compared by a Lessie cube

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

What is green house effect

Write difference between land breeze and sea breeze

Write the ways by which transfer of heat takes place

Define the of flow of heat and write its mathematical form.

What measures do you suggest to conserve energy in houses

Differentiate between conduction and convection.

Explain the impact of greenhouse effect in global

Write any two uses of conductors

What is thermal conductivity

How various surfaces can be compared by a Lessie cube

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

How gliders stay in air for a long period

Define sea breeze, how it is cause?

What is global warming?

What is Leslie cube

What measures do you suggest to conserve energy in houses

Why metals are good conductors of heat

How various surfaces can be compared by a Lessie cube

What is radiation

What is the thermos flask

Which surface is good absorber and which is poor absorber of heat

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

In a thermos flask, how heat is prevented to enter or leave the flask

On which factors does rate of heat flow depends upon?

Explain the impacted of treehouse effect in global warming

Give two uses of convection currents

Why Styrofoam boxes are used to keep food hot or ice cream for a long time.

Why is land breeze blow from land towards sea

Why transfer of heat in fluids takes place by convection

What is radiation

What is Leslie cube

How does heat reaches us from the sun?

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

Define thermals.

Why transfer of heat in fluids takes place by convection?

Transfer of Heat.

How various surfaces can be compared by a Lessie cube

Why metal are good conductors of heat?

For what purpose good conductors are used

Explain why

Why conduction of heat does not take place in gases

Why conduction of heat does no takes place in gases

Define convection

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

Define radiation

Why bottom of cooking pots are made black

Why bottom of cooking pots are made black?