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

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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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 6

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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 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

Submit

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

Question # 1

Why transfer of heat in fluids takes place by convection

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

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

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 4

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 5

Question # 1

Write two uses of conductors.

Ans 1: Uses of conductors: Good conductors are used when quick transfer of heat is required through a body Cookers, cooking plate, boiler, radiators and condensers of refrigerators, etc are made of metals such as aluminum and coper for the better conduction
Metal boxes are used to make ice and ice cream
Ans 2: Uses of non-conductors: Insulators or non-conductors are used in home utensils such as handles of sauce-pans hot plates spoons etc they are made up of wood or plastic
Air is one of the bad conductors or best insulator That is why cavity walls i.e. two walls those are separated by an air space and double glazed windows keep the houses warm in winter and cool in summer

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

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 7

Question # 1

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

Ans 1: Heat does not reach us by convention from a fireplace because the air getting heat from the fireplace does not move in all direction. Hot air moves upward from the fireplace and heat reaches us by waves called radiation.

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

Question # 1

What is the proportionality constant of thermal conductivity

Ans 1: K is the proportionally constant called thermal conductivity of solids
Ans 2: K = Q/T* L/A(T1-T2)

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

Question # 1

How rooms are heated using gas heaters

Ans 1: Rooms are heated using gas heaters by radiation

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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

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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 causes a glider to remain in air

Describe relation of radiation of heat and surface area

Define thermals.

What is green house effect

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

What measurements do you suggest to converse energy in houses

What measures do you suggest to conserve energy in houses

Why transfer of heat in fluids takes place by convection

How gliders stay in air for a long period

On which factors does rate of heat flow depends upon?

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 causes a glider to remain in air

Describe relation of radiation of heat and surface area

Define thermals.

What is green house effect

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

What measurements do you suggest to converse energy in houses

What measures do you suggest to conserve energy in houses

Why transfer of heat in fluids takes place by convection

How gliders stay in air for a long period

On which factors does rate of heat flow depends upon?

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

Why transfer of heat in fluids takes place by convection

Define convection.

Write two consequences of radiations

For what purpose good conductors are used

Write any two uses of conductors

What causes a glider to remain in air

Explain why

Define thermals.

On which factors does rate of heat flow depends upon

Define rate of flow of heat

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

Write use of Styrofoam.

What happen when burner remove under beaker

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

Explain the impact of greenhouse effect in global

In what factors flow of heat depends upon for solids

Why metal are good conductors of heat?

We wear whit and light coloured clothes in summer why

On which factors does rate of heat flow depends upon?

What is meant by conduction

Define convection current in air

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

Write two examples of good and bad conductors each

Give two uses of convection currents.

Why bottom of cooking pots are made black

Give two uses of convection currents

What is meant by global warming

What measures do you suggest to conserve energy in houses

Where is convection currents used

Why transfer of heat in fluids takes place by convection

On which factors does rate of heat flow depends upon

What measurements do you suggest to converse energy in houses

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

Write two uses of conductors.

Why we avoid wear dark colure dresses in summer season

Write two consequences of radiations