Why lightni ng coinductors are fixed at the top of high buildings ?
Because they protect the building from the destructive effects of lightning.
Because they protect the building from cosmic radiations.
Because they protect the building, during summer, from excess heat.,
Because they receive radio and television waves.
What is the main constituent of the sun ?
What is the quantity of fresh, air required for a man ?
500 cubic feet of air every 10 minutes.
500 cubic feet of air every 20 minutes.
1000 cubic feet of air every 10 minutes.
1000 cubic feet of air every 20 minutes.
Why do we not see stars in the day light ?
Because of the powerful light of the sun.
Because stars do not emit any )ight in day time.
Because stars are hidden by the sun.
Because stars are hidden by the clouds.
Why does a green object look green ?
Because green object absorbs no colour.
Because green object absorbs all the colours except green. Green colour is reflected. Therefore, the object looks green.
Because green object absorbs only the green light and rejects all other colours.
Because of none of these.
Why does an electric bulb make a bang when it is broken ?
Because the electric bulb contains compressed gases. When the electric bulb is broken, these gases rush out, thus causing a bang.
Because the electric bulb has a partial vaccum. When the electric bulb is broken, the air rushes in to fill the vaccum, thus causing a bang.
Because the electric bulb is made of a special type of glass which makes a lot of noise when broken.
Because of none of these reasons.
What is a cloud burst ?
Thundering of a cloud.
A sudden shower of rain over a small area.
Lightning b.-fore rain.
Discharge between cloud and high buildings.
Why doe3 radio reception improve after sunset ?
Because the temperature of the atmosphere is lowered and the radio waves travel faster at lower temperature.
Becauie, after sunset, there is less electrical. disturbance in the atmosphere.
Because, after sunset, the atmospheric pressure becomes less.
Because, after sunset, there are less dust particles in theatmosphere.
Which planet is nearest to the sun ?
How electric bulb emits light ?
When the electric current passes through the filament, electrons are emitted. These electrons strike the glass bulb and produce light.
When electric current passes through the filament, a continuous electric discharge takes place between the two filament wires. This electric discharge emits light.
When current passes through the filament, it becomes white hot and, therefore, emits light.
None of these.
1. World Geography -Test-01
2. World Geography -Test-02
3. World Geography -Test-03
4. Geography of India -Test-01
5. Geography of India -Test-02
6. Geography of India -Test-03
7. Geography of India -Test-04
8. Geography of India -Test-05
9. History of India - Test - 01
10. History of India - Test - 02
11. History of India - Test - 03
12. History of India - Test - 04
13. History of India - Test - 05
14. History of India - Test - 06
15. History of India - Test - 07
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Mountain Ranges You Need To Visit
Although theyre not the highest mountains on our list, the Smoky Mountains are part of the most visited region in the United States. As you can guess, the mountains are appropriately named as quite often a natural fog encompasses them.