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

Set 1

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Set 2

10 Questions
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Set 3

10 Questions
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Set 4

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Set 5

10 Questions
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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

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

Submit

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

Question # 1

Write use of Styrofoam.

Ans 1: Styrofoam boxes are used to keep food hot or ice cream cold for a long time because Styrofoam is a bad conductor of heat It does not allow heat to leave or enter the box easily

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

Question # 1

What causes a glider to remain in air

Ans 1: Gliders are caused to remain in air by the movement of hot air currents due to convection. Air current helps them to stay in air for a long period

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

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 English Medium Chapter 9 Preparation - Set 5

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 6

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.

Submit

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

Question # 1

Why transfer of heat in fluids takes place by convection?

Ans 1: In fluids , molecules are not tightly packed. they can easily move from one place to another and convection is done by actual movement of molecules from hotter to colder part.

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

Question # 1

What is the thermo flask?

Ans 1: The thermo flask is a double walled glass vessel, that prevent heat to enter or leave the flask and maintain the temperature inside the flasm.

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

Question # 1

For what purpose good conductors are used

Ans 1: Good conductors are used for quick transfer of heat Thus cookers, cooking plates, boiler, radiators and condensers of refrigerators etc. are made of metal.

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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 are the actors on which rate of emission of radiation depends

Why we avoid wear dark colure dresses in summer season

Why is scientific reason to wear white and light coloured clothes in summer

Write name of two expert Thermal riders

How rooms are heated using gas heaters

How gliders stay in air for a long period

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

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

Why interior surface of pots made polished

Define thermals

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 are the actors on which rate of emission of radiation depends

Why we avoid wear dark colure dresses in summer season

Why is scientific reason to wear white and light coloured clothes in summer

Write name of two expert Thermal riders

How rooms are heated using gas heaters

How gliders stay in air for a long period

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

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

Why interior surface of pots made polished

Define thermals

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

Write use of Styrofoam.

Why heat does not reach us by convection from a fire place

What is meant by global warming

Define convection.

Define sea breeze, how it is cause?

What is greenhouse effect

For what purpose good conductors are used

Transfer of Heat.

Write difference between land breeze and sea breeze

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

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

What causes a glider to remain in air

Write the name some bad conductors.

What is radiation

Why heat does not reach us by convection from a fire place

On which factors does rate of heat flow depends upon

Transfer of Heat.

How heat energy from the sun reach to earth

Why are the metals good conductors of heat

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

Define sea breeze, how it is cause?

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

Define convection current in air

Write the name some bad conductors.

Why is land breeze blow from land towards sea

Define radiation

What is green house effect

Where is convection currents used

Define thermals

How various surfaces can be compared by a Lessie cube

What is radiation?

Define convection.

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

Define convection

Which measures are taken to save energy

Define conduction with example.