# Railway Physics Quiz for RRB ALP Exam |RRB | 29th December 2018

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Q1. Instrument for measuring light intensity is called

(a) Lucimeter

(b) Cryometer

(c) Cyanometer

(d) Barometer

Q2. Which one among the following is not an electro-magnetic wave?

(a) X-Ray

(c) Cathode Ray

(d) Infrared Ray

Q3. Which one of the following is a good electrical conductor?

(a) Graphite

(b) Diamond

(c) Peat

(d) Charcoal

Q4. Which of the following pair is incorrect?

(a) Hygrometer – Water vapour content of the atmosphere

(b) Lactometer – Specific gravity of liquids

(c) Anemometer – Speed of the wind

(d) Seismograph – Earthquakes

Q5. If a body is moving on a circular path, what is its average velocity if it completes one cycle in one second?

(a) Average velocity depends upon time taken to complete one cycle

(b) One

(c) Average velocity is same as average speed

(d) Zero

Q6. Why does a fountain pen leak in aeroplane flying at a height?

(a) Because of reduced viscosity of the ink in the pen

(b) Because of increased viscosity of the ink in the pen

(c) Because of higher atmospheric pressure outside the pen

(d) Because of lower atmospheric pressure outside the pen

Q7. Instrument for measuring wind velocity is called –

(a) Coulombmeter

(b) Anemometer

(c) Cyanometer

(d) Chronometer

Q8. Who was the ﬁrst Indian astronaut to travel in space?

(a) Rakesh Sharma

(b) Ravish Malhotra

(c) Kalpana Chawla

(d) Sheikh Muszaphar Shukor

Q9. When a running car stops suddenly, the passengers tends to lean forward because of –

(a) Centrifugal force

(b) Inertia of rest

(c) Inertia of motion

(d) Gravitation force

Q10. If a boy is sitting in a train, which is moving at a constant velocity throws a ball straight up into the air, the ball will –

(a) fall in front of him

(b) fall behind him

(c) fall into hand

(d) None of the above

## Solution

Ans.1.(a)

Exp. Lucimeter is an instrument used for measuring light intensity.

Ans.2.(c)

Exp. Electromagnetic radiation refers to the waves of the electromagnetic field, propagating through space-time, carrying electromagnetic radiant energy. It includes radio waves, microwaves, infrared, visible light, ultraviolet, X-rays, and gamma rays.

Ans.3.(a)

Exp. Graphite is a very good conductor of electricity due to the mobility of the electrons in its outer valence shells.

Ans.4.(b)

Exp. A lactometer is an instrument used to check purity of milk.

Ans.5.(d)

Exp.

Ans.6.(d)

Exp.The atmospheric pressure decreases with altitude because gas molecules which make up the air concentrate near lower altitude in response to Earth’s gravity. Hence, air pressure is low at higher altitudes. Due to this difference in air pressure, the air inside the pen forces the ink to come out.

Ans.7.(b)

Exp. An anemometer is a device used for measuring the speed of wind.

Ans.8.(a)

Exp. Rakesh Sharma was the first Indian to travel in Space. He was born on 13th January 1949 in Punjab, India. He flew to the Salyut 7 Space Station.

Ans.9.(c)

Exp. When the bus is running, the whole body of the passenger is in the state of motion. When the bus stops suddenly, the lower part of the passengers body which is in contact with the bus, comes to rest. But the passengers upper portion remains in the state of motion due to the inertia of motion. This is the reason for the passenger to lean forward when the bus stops suddenly.

Ans.10.(c)

Exp. If a boy is sitting in a train, which is moving at a constant velocity throws a ball straight up into the air, the ball will fall into his hand.

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