3
Q:

# A boy sitting in a train moving with a uniform velocity drops a coin outside. A man standing outside the train will find the trajectory of the coin to be

 A) a parabola B) a circle C) a horizontal straight line D) a vertical straight line

Explanation:

Parabola, because when the coin is dropped at a particular point, it has the same velocity as the running train. So by Newton's first law, it continues its motion horizontally with that velocity. But then, it is also pulled down by earth's gravity continuously. In this situation its horizontal motion gives way to the parabolic motion until it reaches the ground.

Subject: Physics
Q:

According to _____, pressure is equal to the force divided by the area on which it acts.

 A) Hooke's Law B) Newton's Law C) Pascal's Law D) Stefan-Boltzmann Law

Explanation:

Filed Under: Physics
Exam Prep: Bank Exams

0 32
Q:

Which instrument is used to measure the intensity of light produced by an unknown source in terms of a standard source?

 A) Dynamometer B) Calipers C) Photometer D) Ammeter

Explanation:

Filed Under: Physics
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0 64
Q:

Identify the unit of measuring intensity of sound.

 A) Decibels B) Knots C) Candela D) Ampere

Explanation:

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0 41
Q:

Which instrument is used to measure blood pressure?

 A) Sphygmomanometer B) Lactometer C) Thermometer D) Glucometer

Explanation:

Filed Under: Physics
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0 44
Q:

The term ______ is prefixed to scientific terms to describe something that is constant.

 A) Photo B) Iso C) Mega D) Quasi

Explanation:

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0 137
Q:

1 horsepower = approximately _____ watts.

 A) 746 B) 764 C) 647 D) 674

Explanation:

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3 351
Q:

Which law of physics states that the force between the two electric charges reduces to a quarter of its former value when the distance between them is doubled?

 A) Coulomb’s Law B) Stefan's Law C) Pascal's Law D) Hooke's Law

Explanation:

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0 307
Q:

What is the unit of measure of a magnetic field?

 A) Cobalt B) Ohm C) Tesla D) Ampere