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

Why bottom of cooking pots are made black?

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

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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

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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

Why bottom of cooking pots are made black?

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

Submit

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

Question # 1

Define rate of flow of heat?

Ans 1: The amount of heat that flows in unit time is called rate of flow heat. Rate of flow of heat = Q/t Unit: Its unit is Js-1

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

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 4

Question # 1

Define conduction with example

Ans 1: The mode of transfer of heat by vibrating atoms and free electrons in solids from hot to cold parts of a body is called conduction of heat
Ans 2: Example: All metals are good conductors of heat

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

Question # 1

Define rate of flow of heat

Ans 1: The amount of heat that flow in unit time is called rate of flow heat
Ans 2: Unit: Its unit is js

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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

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

Question # 1

What measurements do you suggest to converse energy in houses

Ans 1: Measurements to converse energy
We should switch off extra electric equipment's in
order to conserve energy in houses
The use to LED lights can also conserve electricity.

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

Question # 1

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

Ans 1: White and light coloured surfaces reflect move heat than coloured or black surfaces. That why we wear white or light coloured clothes in summer which reflect most of heat radiations reacting us during hot day

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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

Why bottom of cooking pots are made black?

Described an experiment of convection.

Differentiate between conductors and insulator

Define convection

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

Give two uses of convection currents.

Give two uses of convection currents

On which factors does rate of heat flow depends upon

Why bottoms of cooking pots are made black

Differentiate between conduction and convection.

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

Why bottom of cooking pots are made black?

Described an experiment of convection.

Differentiate between conductors and insulator

Define convection

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

Give two uses of convection currents.

Give two uses of convection currents

On which factors does rate of heat flow depends upon

Why bottoms of cooking pots are made black

Differentiate between conduction and convection.

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

Define rate of flow of heat?

Transfer of Heat.

How various surfaces can be compared by a Lessie cube

Why bottom of cooking pots are made black?

Why transfer of heat in fluids takes place by convection?

Write use of Styrofoam.

Define thermals.

Define convection

How does heat reaches us from the sun?

Define conduction with example.

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

Define convection current in air

Why are the metals good conductors of heat

Where is convection currents used

Write the ways by which transfer of heat takes place

What is meant by convection current

What is meant by transfer of heat

Define thermals

How gliders stay in air for a long period

What happen when burner remove under beaker

Write any two uses of conductors

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

Define conduction with example

Why we avoid wear dark colure dresses in summer season

What is thermal conductivity

Define thermals.

What is green house effect

What measures do you suggest to conserve energy in houses

Why transfer of heat in fluids takes place by convection?

Explain the impacted of treehouse effect in global warming

What happen when burner remove under beaker

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

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

Define rate of flow of heat

Write two examples of good and bad conductors each

What is meant by convection currents