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

On which factors does rate of heat flow depends upon

Ans 1: There are three factors on which rate of flow depends upon
Cross sectional area of a solid
Temperature difference between ends
Length of the solid

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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 3

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Set 4

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Set 9

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

Question # 1

On which factors does rate of heat flow depends upon

Ans 1: There are three factors on which rate of flow depends upon
Cross sectional area of a solid
Temperature difference between ends
Length of the solid

Submit

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

Question # 1

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

Ans 1: When temperature of an object is higher than its surrounded area then it is radiating more heat than it is absorbing As a result its temperature goes on decreasing on decreasing till it becomes equal to tis surroundings.

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

Question # 1

Write difference between land breeze and sea breeze

Ans 1: Land breezes: At night, the land cools faster than the sea, Therefore, air above the sea ins warmer, rises up and colder air from the land begins to move towards the sea. It is called land breeze
Ans 2: Sea breezes: On a hot day, the temperature of the land increases more quickly than the sea, Because the specific heat of land is much smaller as compared to water. The air above land gets hot and rises up. The cold air from the sea begins to move towards the land. It is called the sea breeze

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

Question # 1

Define sea breeze, how it is cause?

Ans 1: On a hot day, cold air from the sea beings to move towards the land, this is called sea land breeze.

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

Question # 1

For what purpose double glazed windows are used.

Ans 1: Because air is the one of bad conductor or best insulator. That is why cavity wall i.e two walls separated by an air space and double glazed windows keep the house warm in winter and cool in summer.

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

Question # 1

Why conduction of heat does no takes place in gases

Ans 1: Conduction takes place when the molecules are closely packed together and there are free electrons GASES DO NOT CONTAIN FREE ELECTRONS their MOLECULES ARE LOOSELY PACKES, HENCE THE PROCESS OF CONDUCTION DOES NO TAKES PLACE IN GASES

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

Question # 1

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

Ans 1: This is done by suitable measure to reduce the transfer of heat due to conduction, conversion and radiation. Thus anything kept in it maintains its temperature for a long time.

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

Question # 1

What is greenhouse effect?

Ans 1: When heat energy reflects from the earth surface, rays with shorter wavelength reflect back towards Sun but before all this radiation can escape to outer space, green house gases in the atmosphere absorb some of it. Which makes the atmosphere warner and Earth's surface also warmer. This is called green house effect.

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

Question # 1

Why conduction of heat does no takes place in gases

Ans 1: Conduction takes place when the molecules are closely packed together and there are free electrons GASES DO NOT CONTAIN FREE ELECTRONS their MOLECULES ARE LOOSELY PACKES, HENCE THE PROCESS OF CONDUCTION DOES NO TAKES PLACE IN GASES

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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

On which factors does rate of heat flow depends upon

Write two uses of non-conductors

Define convection.

Described an experiment of convection.

What is meant by conduction

How many sides of a Leslie cube are

Why we avoid wear dark colure dresses in summer season

Write two uses of conductors.

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

Why conduction of heat does not take place in gases

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

On which factors does rate of heat flow depends upon

Write two uses of non-conductors

Define convection.

Described an experiment of convection.

What is meant by conduction

How many sides of a Leslie cube are

Why we avoid wear dark colure dresses in summer season

Write two uses of conductors.

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

Why conduction of heat does not take place in gases

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

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

What is global warming?

Write name of two expert Thermal riders

Define thermals

Define radiation

What is meant by conduction

Where is convection currents used

Why interior surface of pots made polished

Why bottom of cooking pots are made black

Why transfer of heat in fluids takes place by convection

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

Write difference between land breeze and sea breeze

What measurements do you suggest to converse energy in houses

What is meant by transfer of heat

Why we avoid wear dark colure dresses in summer season

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

How gliders stay in air for a long period

For what purpose good conductors are used

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

Write use of Styrofoam.

Where is convection currents used

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

Define sea breeze, how it is cause?

In what factors flow of heat depends upon for solids

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

Why metals are good conductors of heat

Explain the impact of greenhouse effect in global

Define convection current in air

Write difference between land breeze and sea breeze

What is green house effect

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

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

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

For what purpose double glazed windows are used.

What is radiation?

What is Leslie cube