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Physics

Physics
Who among the following discovered X-rays?

J.J Thomson
Marie Curie
W.C Roentgen
James Chadwick

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Physics
Global warming is expected to result in

Increase in level of sea
All of these
Change in coast line
Change in crop pattern

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Physics
Which one of the following determines the sharpness of image in a camera ?

The focal length of the lens
The exposure time
Size of the camera
The aperture

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Physics
The velocity required to place a vehicle in orbit around the moon is ________ that required to place it in orbit round the earth.

Greater than
Equal to
Greater than or equal to
Less than

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Physics
An image formed by a plane mirror, that cannot be obtained on a screen is called ________

Erect image
Virtual image
Inverted image
Real image

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Physics
Air coolers are more suitable for

Cool and humid climate
Cool and dry climate
Hot and humid climate
Hot and dry climate

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