General Science Jkssb Physics Set 1 Mcqs (448 MCQs) | JKSSB & SSC Quiz

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jkssb physics set 1 mcqs

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Practice Questions

448 Total
Question 21 Discuss
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Who among the following confirmed Maxwell's theories with the discovery of radio waves and also became the first person to transmit and receive controlled radio waves in 1886?

A
Guglielmo Marconi
B
William Hopkins
C
Michael Faraday
D
Heinrich Hertz

Answer & Explanation

Correct Option: D

Heinrich Hertz proved the existence of electromagnetic waves predicted by Maxwell, leading to the unit 'Hertz' being named after him.
Question 22 Discuss
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At a height of 5 meters, what is the ratio of potential energy to kinetic energy for a 2kg mass dropped from 10 meters?

A
1:2
B
1:1
C
2:1
D
3:1

Answer & Explanation

Correct Option: B

At the halfway point (5m), the object has lost half its potential energy which has converted to kinetic energy, making the ratio 1:1.
Question 23 Discuss
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Which of the following statements is INCORRECT regarding the Coriolis force?

A
It is absent at the equator.
B
Deflection is less when the wind is high.
C
It deflects the wind to the right in the north and left in the south.
D
It is directly proportional to the angle of altitude

Answer & Explanation

Correct Option: B

The Coriolis force is actually directly proportional to wind speed; therefore, higher wind speed results in greater deflection, not less.
Question 24 Discuss
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Who calculated the approximate location of the planet Neptune by studying gravity induced disturbances in the motion of Uranus?

A
John Couch Adams
B
Johann Gottfried Galle
C
Urbain-Jean-Joseph Le Verrier
D
Percival Lowell

Answer & Explanation

Correct Option: C

Le Verrier used mathematical calculations to predict Neptune's position, which was then confirmed by observation in 1846.
Question 25 Discuss
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In which year did Galileo describe the regular, swinging motion of a pendulum by the action of gravity and acquired momentum?

A
1605
B
1600
C
1599
D
1602

Answer & Explanation

Correct Option: D

Galileo began his study of pendulums in the early 1600s, famously observing their isochronism while watching a swinging lamp in the Cathedral of Pisa.
Question 26 Discuss
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In 1835, who developed the process of applying a thin layer of metallic silver to one side of a clear glass pane and created the first mirror?

A
CV Raman
B
Victor Francis Hess
C
CH Townes
D
Justus von Liebig

Answer & Explanation

Correct Option: D

German chemist Justus von Liebig developed the chemical silvering process in 1835, leading to the mass production of modern mirrors.
Question 27 Discuss
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In which year did Eric A. Cornell, Wolfgang Ketterle and Carl E. Wieman receive the Nobel Prize in Physics for achieving 'Bose-Einstein condensation'?

A
1999
B
2001
C
2005
D
2010

Answer & Explanation

Correct Option: B

These three scientists were awarded the Nobel Prize in 2001 for their 1995 creation of the first Bose-Einstein condensate, a new state of matter.
Question 28 Discuss
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Identify the INCORRECT pair regarding the material media and their refractive index?

A
Sapphire - 1.77
B
Kerosene - 1.44
C
Ruby - 1.71
D
Benzene - 2.42

Answer & Explanation

Correct Option: D

The refractive index of Benzene is approximately 1.50, not 2.42 (which is closer to the refractive index of diamond).
Question 29 Discuss
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Find the acceleration (in m/s2) of a body which accelerates from 5 m/s to 10 m/s in 2 seconds.

A
7.5 m/sec2
B
5 m/sec2
C
10 m/sec2
D
2.5 m/sec2

Answer & Explanation

Correct Option: D

Acceleration is the change in velocity divided by time: (10m/s - 5m/s) / 2s = 2.5 m/s².
Question 30 Discuss
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The average separation between the sun and the earth in terms of light years is 8.311 minutes. Here, minutes indicate:

A
time
B
distance
C
velocity
D
speed

Answer & Explanation

Correct Option: B

Similar to 'light years', 'light minutes' measures the distance light travels in a specific time, approximately 150 million kilometers for the Sun-Earth distance.
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