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Questions and Answers
What is the distance of the gun from the cliff if the echo is heard after 2.5 seconds, given the velocity of sound in air is 332 m/s?
What is the distance of the gun from the cliff if the echo is heard after 2.5 seconds, given the velocity of sound in air is 332 m/s?
- 415 m
- 420 m
- 840 m
- 830 m (correct)
Which of the following is not a property of ultrasound that makes it useful in medicine?
Which of the following is not a property of ultrasound that makes it useful in medicine?
- The waves are transverse (correct)
- High frequency
- Ability to travel along path even with obstacles
- None of the above
Where are electric wires generally coated with?
Where are electric wires generally coated with?
- Polyvinyl chloride
- Polyurethane (correct)
- Polypropylene
- Polyethylene
In electromagnetic induction, electrical energy induced in a conductor comes from which form of energy?
In electromagnetic induction, electrical energy induced in a conductor comes from which form of energy?
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What type of mirrors does a periscope make use of?
What type of mirrors does a periscope make use of?
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If the force between two charges is 200 N and the distance between them is doubled, what will be the new force?
If the force between two charges is 200 N and the distance between them is doubled, what will be the new force?
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