General Knowledge Quiz 40 - Switched on kids

General Knowledge Quiz 40

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This is a timed quiz. You will be given 120 seconds to answer all questions. Are you ready?

120
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Light travels slower in glass than in air because:

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Which one among the following is not produced by sound waves in air?

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‘Newton’s disc’ when rotated at a great speed appears ?

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Light travels in optical fibre irrespective of its shape because it is a device by which signals can be transferred from one location to another. It is based on the phenomenon of

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The audible frequency range of a human ear is:

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In vacuum, the speed of light:

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Bats can ascertain distances, directions, nature and size of the obstacles at night. This is possible by reflection of the emitted ?

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Ultrasonic waves are those sound waves having frequency?

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General Knowledge Quiz 40
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