The ringing of an electric bell in an enclosed evacuated glass bell jar is not heard outside because
Answer: D
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When a steel ball is placed on the surface of mercury, it does not sink because
Answer: D
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Large transformers, when used for some time, become very hot and are cooled by circulating oil. The heating of the transformer is due to
Answer: C
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An integrated circuit is more advantages than a coventional circuit because
Answer: D
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Which metal is commonly used for making an electromagnet?
Answer: A
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Radian is used to measure
Answer: C
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When two similar sources vibrate with slightly different frequencies, a regular rise and fall occurs in the loudness of tone. This phenomenon is known as
Answer: B
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It takes much longer to cook food in the hills than in the plains, because
Answer: A
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In which of the following industries is mica as a raw material?
Answer: D
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Nuclear Fission is caused by the impact of
Answer: B
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