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What are the effects of lightning?
Concept: undefined >> undefined
What is a lightning conductor? How does it work?
Concept: undefined >> undefined
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How is a tall building protected from damage due to lightning?
Concept: undefined >> undefined
State three safety measures that you will observe in thunder storm.
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A coolie does no work against the force of gravity while carrying a luggage on a road.
Concept: undefined >> undefined
Water is optically denser than glass.
Concept: undefined >> undefined
A ray of light when passes from glass to air, bends towards the normal.
Concept: undefined >> undefined
Work done by a boy depends on the time in which he does work.
Concept: undefined >> undefined
The speed of light is more in glass than in water.
Concept: undefined >> undefined
Power spent by a body depends on the time for which it does work.
Concept: undefined >> undefined
Work is said to be done by a forte only when ................
Concept: undefined >> undefined
The depth of a pond when seen from above appears to be less.
Concept: undefined >> undefined
Work done = Force × ........................................
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The energy of a body is its capacity to do .........
Concept: undefined >> undefined
The S.I. unit of energy is .............
Concept: undefined >> undefined
Light travels at a lower speed in water than in air.
Concept: undefined >> undefined
Image is formed by a mirror due to refraction of light.
Concept: undefined >> undefined
No work is done by a force if the body
Concept: undefined >> undefined
