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 horizontal straight line C) a vertical straight line D) a circle

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:

1 horsepower = approximately _____ watts.

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

Explanation:

Filed Under: Physics
Exam Prep: Bank Exams

3 84
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:

Filed Under: Physics
Exam Prep: Bank Exams

0 215
Q:

What is the unit of measure of a magnetic field?

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

Explanation:

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2 191
Q:

_______ expansion makes the Eiffel Tower taller during summers.

 A) Thermal B) Chemical C) Gravitational D) Gradient

Explanation:

Filed Under: Physics
Exam Prep: AIEEE , Bank Exams

3 1271
Q:

Georg Simon Ohm in whose honour we have the famous Ohm’s Law, hailed from which country?

 A) Russia B) Spain C) Poland D) Germany

Explanation:

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Exam Prep: Bank Exams

1 1346
Q:

Purpose of an optical filter is to

 A) reflect lights of different colours B) dispense light into component colours C) refract light of different colours D) transmit or absorb light of different colours

Answer & Explanation Answer: D) transmit or absorb light of different colours

Explanation:

Filed Under: Physics
Exam Prep: AIEEE , Bank Exams

2 183
Q:

Which of the following statements is/are true about the speed of sound in different media at 25°C

A. In steel, the speed of sound is 5960 m/s
B. In nickel, the speed of sound is 6240 km/s

 A) Only A is true B) Neither A nor B i s true C) Both A and B are true D) Only B is true

Explanation:

Filed Under: Physics
Exam Prep: Bank Exams

3 224
Q:

Momentum = ..............?

 A) Mass x Acceleration B) Mass / Volume C) Mass x Velocity D) Mass x Density