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

Describe relation of radiation of heat and surface area

Ans 1: Transfer of heat by radiation is also affected by the surface area of the body emitting or absorbing heat larger is the area, greater will be the transfer of heat.

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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

Describe relation of radiation of heat and surface area

Ans 1: Transfer of heat by radiation is also affected by the surface area of the body emitting or absorbing heat larger is the area, greater will be the transfer of heat.

Submit

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

Question # 1

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

Ans 1: Rate of flow of heat: The amount of heat that flows in unit time is called rate of flow of heat
Ans 2: Formula: rate of flow of heat
Depending factors
Cross sectional area of the solid (a)
Length of the solid (L)
Temperature difference between ends

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

Question # 1

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

Ans 1: Styrofoam is a bad conductor of heat. It does ot 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

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 5

Question # 1

Why bottom of cooking pots are made black

Ans 1: Bottoms of cooking pots are made black because the black surface is a good absorber of heat so food cook quickly

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

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 7

Question # 1

We wear whit and light coloured clothes in summer why

Ans 1:
We wear white and light oloured clothes in summer which reflect most of the heat radiation reaching us during the hot day

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

Question # 1

Write two consequences of radiations

Ans 1: Different objects absorb different amount of heat radiations falling upon them A black coloured body gets hot quickly by absorbing heat radiations coming to it also cools down quickly by radiating heat to its surroundings.

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

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 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

Describe relation of radiation of heat and surface area

Define sea breeze, how it is cause?

What is global warming?

What is radiation

What is greenhouse effect

What happen when burner remove under beaker

On which factors does rate of heat flow depends upon?

Why interior surface of pots made polished

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

Write use of Styrofoam.

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

Describe relation of radiation of heat and surface area

Define sea breeze, how it is cause?

What is global warming?

What is radiation

What is greenhouse effect

What happen when burner remove under beaker

On which factors does rate of heat flow depends upon?

Why interior surface of pots made polished

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

Write use of Styrofoam.

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

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

How rooms are heated using gas heaters

How many sides of a Leslie cube are

Why conduction of heat does no takes place in gases

Transfer of Heat.

Define radiation

What is thermal conductivity

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

Define convection.

In what factors flow of heat depends upon for solids

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

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

What is global warming?

Write difference between land breeze and sea breeze

Write any two measures to save energy

How rooms are heated using gas heaters

When does an object is radiating more heat than it is absorbing

Describe relation of radiation of heat and surface area

Why bottoms of cooking pots are made black

For what purpose good conductors are used

Why we avoid wear dark colure dresses in summer season

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

Explain the impacted of treehouse effect in global warming

What is meant by conduction

Differentiate between conduction and convection.

How does the heat flow from hot to cold parts in metals rapidly than non-metals

Define thermal conductivity.

Define convection

What measures do you suggest to conserve energy in houses

What is greenhouse effect

How rooms are heated using gas heaters

What is meant by transfer of heat

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

Why bottom of cooking pots are made black

Define sea breeze, how it is cause?

Write the name some bad conductors.