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 41 Discuss
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Which of the following forces can only be applied when in contact with an object?

A
Frictional force
B
Gravitational force
C
Electrostatic force
D
Magnetic force

Answer & Explanation

Correct Option: A

Friction is a contact force that opposes the relative motion between two surfaces in physical contact with each other.
Question 42 Discuss
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Who discovered a principle that states that the buoyant force on an object is equal to the weight of the fluid displaced by the object?

A
Isaac Newton
B
Niels Bohr
C
Archimedes
D
Galileo Galilei

Answer & Explanation

Correct Option: C

Archimedes of Syracuse discovered this principle around 250 BC, providing a mathematical basis for hydrostatics and buoyancy.
Question 43 Discuss
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Which of the following statement /statements is/are true regarding the light year?

A
Only 1 is correct
B
Only 1 and 3 are correct
C
Only 2 is correct
D
Only 1 and 2 are correct

Answer & Explanation

Correct Option: B

A light-year is a unit of astronomical distance defined as the total distance that light travels in a vacuum in one Julian year.
Question 44 Discuss
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Identify the device used to change the resistance in an electric circuit.

A
Ammeter
B
Rheostat
C
Conductor
D
Voltmeter

Answer & Explanation

Correct Option: B

A rheostat is a variable resistor used to control current by manually increasing or decreasing the resistance in a circuit.
Question 45 Discuss
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Which of the following is used for determining the value of 1 ampere.

A
𝐴 = 1𝐶/s
B
C = A/2 s
C
𝐴 = 2𝐶/𝑠
D
C = A×2 s

Answer & Explanation

Correct Option: A

One ampere is defined as the flow of one coulomb of charge per second through a given point in an electric circuit.
Question 46 Discuss
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Which of the following is an example of inertia of rest?

A
Falling down backward when a vehicle starts immediately
B
Falling down of dust particle while dusting a cloth
C
The detachment of leaves/fruits due to shaking
D
The sudden application of brakes in a vehicle

Answer & Explanation

Correct Option: D

The sudden application of brakes causes a body to fall forward due to 'inertia of motion,' making it the incorrect example if looking for inertia of rest.
Question 47 Discuss
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What kind of energy does a yo-yo have before it is released?

A
Potential energy
B
Light energy
C
Chemical energy
D
Kinetic energy

Answer & Explanation

Correct Option: A

Before release, a yo-yo held at a height possesses gravitational potential energy which converts into kinetic energy as it falls.
Question 48 Discuss
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Who among the following physicists invented the voltaic pile, the forerunner of the modern battery, in 1800 ?

A
Andre-Marie Ampere
B
George Simon
C
Alessandro Volta
D
Hans Christian Oersted

Answer & Explanation

Correct Option: C

Alessandro Volta invented the first chemical battery in 1800, proving that electricity could be generated chemically rather than only biologically.
Question 49 Discuss
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Which wave oscillates parallel to the motion of the sound wave?

A
Mechanical wave
B
Electromagnetic wave
C
Transverse wave
D
Longitudinal wave

Answer & Explanation

Correct Option: D

Longitudinal waves, such as sound waves, involve particles vibrating back and forth in the same direction that the wave travels.
Question 50 Discuss
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Which physicist is known to establish the relationship between mechanical work and heat transfer?

A
Hermann Helmholtz
B
John Dalton
C
James Prescott Joule
D
William Henry

Answer & Explanation

Correct Option: C

Joule's experiments in the mid-19th century established the mechanical equivalent of heat, leading to the first law of thermodynamics.
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