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

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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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

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 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

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

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 4

Question # 1

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

Ans 1: A dull black surface is a good absorber and a polished surface is poor absorber of heat

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

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 6

Question # 1

Write two examples of good and bad conductors each

Ans 1: Good Conductors of Heat is Iron, Copper, Aluminum Bad conductors of heat is Wool ,Fur, Air

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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

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 9

Question # 1

Give two uses of convection currents.

Ans 1: i. Convention current set up by electric, gas or coal heaters help to warm our homes and offices. ii. Land and sea breeze are also cause by convection currents.

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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

For what purpose good conductors are used

What is green house effect

Define conduction with example

What measurements do you suggest to converse energy in houses

Define thermal conductivity.

We wear whit and light coloured clothes in summer why

Why transfer of heat in fluids takes place by convection?

Define thermals

What is thermal conductivity

Why metal are good conductors of heat?

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

For what purpose good conductors are used

What is green house effect

Define conduction with example

What measurements do you suggest to converse energy in houses

Define thermal conductivity.

We wear whit and light coloured clothes in summer why

Why transfer of heat in fluids takes place by convection?

Define thermals

What is thermal conductivity

Why metal are good conductors of heat?

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

Described an experiment of convection.

Give two uses of convection currents

What is meant by global warming

What is radiation?

Differentiate between conductors and insulator

Write use of Styrofoam.

What is greenhouse effect

Define thermals

Where is convection currents used

Write two consequences of radiations

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

Why metal are good conductors of heat?

Give two uses of convection currents.

Write the name some bad conductors.

What is the proportionality constant of thermal conductivity

Define rate of flow of heat?

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

Define convection current in air

Write two uses of conductors.

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

Describe relation of radiation of heat and surface area

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

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

What is Leslie cube

Why bottom of cooking pots are made black?

How rooms are heated using gas heaters

Explain the impacted of treehouse effect in global warming

What causes a glider to remain in air

What is Leslie's cube

Why metal are good conductors of heat?

Describe relation of radiation of heat and surface area

Explain why

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

Write any two measures to save energy

How heat energy from the sun reach to earth

How various surfaces can be compared by a Lessie cube