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

Why metals 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 hey carry energy at a very fast rate from hot to cold parts of object

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

Set 1

10 Questions
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Set 2

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Set 3

10 Questions
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Set 4

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Set 5

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Set 6

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Set 7

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Set 8

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Set 9

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

Question # 1

Why metals 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 hey 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 2

Question # 1

What is meant by transfer of heat

Ans 1: Transfer of heat: Thermal energy from a hot body flows to a cold body in the form of heat This is called as transfer of heat Transfer of heat is a natural process
Method of heat transfer
Conduction, Convection, Radiation

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

Question # 1

Define thermal conductivity.

Ans 1: substance maintained at a temperature difference of one kelvin is called the thermal conductivity of that substance. Unit: The SI unit of thermal conductivity is Wm-1 K-1

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

Question # 1

Write any two measures to save energy

Ans 1: Hot water thanks are insulated by plastic or foam lagging Wall cavities are filled with plastic foam or mineral wool Ceiling of rooms is covered by insulating materials ceiling

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

Question # 1

What is Leslie's cube

Ans 1: Leslie cube: A Leslie cube is a metal box having faces different nature
A shining silvered surface, A dull black surface, A white surface, A coloured surface

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

Question # 1

What are the actors on which rate of emission of radiation depends

Ans 1: The rate at which radiation are emitted depends upon various factors such
Color and texture of the surface
Surface temperature
Surface area

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

Question # 1

What measures do you suggest to conserve energy in houses

Ans 1: Following measures should be taken to conserve or save energy
Insulting the ceiling, Cavities are filled with plastic foam or wool,Doubel glazed window panes are used, Hot water tanked is insulated by plastic or foam logging.

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

Question # 1

Define convection

Ans 1: Convection currents: Transfer of heat by actual movement of molecules from hot place to a cold place is known as convection
Ans 2: Examples: Ballons in flated with hot air rise up Air becomes lighter on heating which is due to convection
Land and sea breezes are the result of convection
A glider files like a small aero plane without engine which is due to convection.

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

Question # 1

Why we avoid wear dark colure dresses in summer season

Ans 1: Dark color absolves high energy radiations and becomes hot That is reason that we avoid wear dark color dresses in summer season

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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

Why metals are good conductors of heat

On which factors does rate of heat flow depends upon?

For what purpose good conductors are used

Write the ways by which transfer of heat takes place

What is thermal conductivity

Define rate of flow of heat

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

Define convection current in air

We wear whit and light coloured clothes in summer why

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

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

Why metals are good conductors of heat

On which factors does rate of heat flow depends upon?

For what purpose good conductors are used

Write the ways by which transfer of heat takes place

What is thermal conductivity

Define rate of flow of heat

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

Define convection current in air

We wear whit and light coloured clothes in summer why

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

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

What is meant by transfer of heat

Write two uses of conductors.

Why is land breeze blow from land towards sea

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

Write use of Styrofoam.

What is global warming?

How heat energy from the sun reach to earth

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

Define conduction with example.

Write the name some bad conductors.

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

Define thermal conductivity.

Why bottom of cooking pots are made black

Why metals are good conductors of heat

Explain the impacted of treehouse effect in global warming

Write two examples of good and bad conductors each

What measurements do you suggest to converse energy in houses

Why are the metals good conductors of heat

Define thermals.

On which factors does rate of heat flow depends upon

Write two consequences of radiations

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

Write any two measures to save energy

For what purpose good conductors are used

Define convection

What measures do you suggest to conserve energy in houses

Define conduction with example

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

What is meant by global warming

Why metals are good conductors of heat

What is global warming

Why transfer of heat in fluids takes place by convection

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

What is Leslie's cube

Why is land breeze blow from land towards sea

Why bottoms of cooking pots are made black