EASY
Earn 100

List some disadvantages of greenhouse gases.

Important Questions on Energy Production

EASY
Physics>Energy and Heat Transfer>Energy Production>Solar Constant and Greenhouse Effect

_____ is not necessary on radiation for heat transmission.

HARD
Physics>Energy and Heat Transfer>Energy Production>Solar Constant and Greenhouse Effect
What is global warming? Name the gas whose increasing percentage in the air is leading to global warming. State a harmful effect which can be caused by global warming.
MEDIUM
Physics>Energy and Heat Transfer>Energy Production>Solar Constant and Greenhouse Effect

What is the colour of a white object when the following coloured lights shine on it?

A mixture of red, blue and green

MEDIUM
Physics>Energy and Heat Transfer>Energy Production>Solar Constant and Greenhouse Effect

The firefighting suits are always bright and shiny. Why?

EASY
Physics>Energy and Heat Transfer>Energy Production>Solar Constant and Greenhouse Effect

How is radiation different from conduction and convection for transfer of heat?

EASY
Physics>Energy and Heat Transfer>Energy Production>Solar Constant and Greenhouse Effect
Increased combustion of which of the following gas is believed to cause global warming?
MEDIUM
Physics>Energy and Heat Transfer>Energy Production>Solar Constant and Greenhouse Effect

What is the colour of a white object when the following coloured lights shine on it?

 Red

MEDIUM
Physics>Energy and Heat Transfer>Energy Production>Solar Constant and Greenhouse Effect
What is radiant heat? How do black and white coloured objects absorb heat?
MEDIUM
Physics>Energy and Heat Transfer>Energy Production>Solar Constant and Greenhouse Effect
Why are the pipes of solar heater and the containers of solar cooker painted black?
MEDIUM
Physics>Energy and Heat Transfer>Energy Production>Solar Constant and Greenhouse Effect

A person has a white shirt and a black shirt. Which shirt will make him more comfortable in (a) winters, (b) summers? Give reason for your answer.

EASY
Physics>Energy and Heat Transfer>Energy Production>Solar Constant and Greenhouse Effect
How does the heat from the sun reach the earth?
EASY
Physics>Energy and Heat Transfer>Energy Production>Solar Constant and Greenhouse Effect
Give an example from everyday life where heat is transferred by radiation.
EASY
Physics>Energy and Heat Transfer>Energy Production>Solar Constant and Greenhouse Effect
In radiation mode of heat transfer, the particles of the medium move from one place to another, carrying heat with them.
EASY
Physics>Energy and Heat Transfer>Energy Production>Solar Constant and Greenhouse Effect
The mode of heat transfer that does not require a medium is -
EASY
Physics>Energy and Heat Transfer>Energy Production>Solar Constant and Greenhouse Effect

Give reason for the following:

The water pipe in a solar water heater is bent into the shape as given in the picture.

Question Image

 

 

 

EASY
Physics>Energy and Heat Transfer>Energy Production>Solar Constant and Greenhouse Effect

Define radiation. Give one example to show heat transfer by radiation.

HARD
Physics>Energy and Heat Transfer>Energy Production>Solar Constant and Greenhouse Effect
What is global warming? What can be its consequences?
HARD
Physics>Energy and Heat Transfer>Energy Production>Solar Constant and Greenhouse Effect
Which of the following is not an effect of global warming?
HARD
Physics>Energy and Heat Transfer>Energy Production>Solar Constant and Greenhouse Effect
How can heat loss through radiation be reduced in a vacuum flask? Explain with a diagram.
EASY
Physics>Energy and Heat Transfer>Energy Production>Solar Constant and Greenhouse Effect
A piece of white paper and another of black paper are placed over the snow in sunshine. In which case the ice would melt faster?