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 71 Discuss
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Which of the following options represents only the units of energy?

A
Calorie, Kilowatt hour, Newton
B
Joule, Calorie, Newton
C
Joule, Newton, Kilowatt hour
D
Joule, Calorie, Kilowatt hour

Answer & Explanation

Correct Option: D

Joule (SI unit), Calorie (heat energy), and Kilowatt-hour (electrical energy) are all valid measurements for the capacity to do work.
Question 72 Discuss
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Which physicist was famous for the gold foil experiment?

A
Ernest Rutherford
B
Niels Bohr
C
JJ Thomson
D
John Dalton

Answer & Explanation

Correct Option: A

In 1909, Rutherford's gold foil experiment showed that atoms have a small, dense, positively charged nucleus, overturning the plum pudding model.
Question 73 Discuss
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Coulomb's law is applicable for .

A
Between two distributed charges
B
Between two point charges
C
both distributed charges and point charges
D
neither point charges nor distributed charges

Answer & Explanation

Correct Option: B

Coulomb's Law mathematically describes the electrostatic force between two stationary point charges, where the size of the objects is negligible compared to the distance between them.
Question 74 Discuss
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How is the image formed by a plane mirror?

A
Virtual and inverted
B
Virtual and erect
C
Erect and inverted
D
Laterally inverted and virtual

Answer & Explanation

Correct Option: D

A plane mirror forms a virtual image that is the same size as the object, erect, and laterally inverted (left appears right).
Question 75 Discuss
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What is the SI unit of force?

A
Ohm
B
Newton
C
Watt
D
Volt

Answer & Explanation

Correct Option: B

The Newton (N) is the SI unit of force, named after Sir Isaac Newton, and is defined as the force required to accelerate 1 kg by 1 m/s².
Question 76 Discuss
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Why is it advised not to touch a switchboard with wet hands?

A
Water can erode the switchboard.
B
Combination of water and our body is a good conductor of electricity.
C
Wet hands can fade away the colour coat of the switchboard.
D
Wet hands might slip from the switch.

Answer & Explanation

Correct Option: B

Impurities in water make it conductive; touching an electrical source with wet hands significantly reduces body resistance, increasing the risk of a fatal shock.
Question 77 Discuss
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Pascal is the SI unit of , which is defined as a force of 1 N applied uniformly over an area of 1 m2.

A
pressure
B
energy
C
mass density
D
power

Answer & Explanation

Correct Option: A

Named after Blaise Pascal, the pascal (Pa) measures pressure and stress, representing the force exerted perpendicularly on a unit area.
Question 78 Discuss
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The equipment used to record the intensity of an earthquake is .

A
seismograph
B
pyrometer
C
barometer
D
calorimeter

Answer & Explanation

Correct Option: A

A seismograph detects and records the ground motion caused by seismic waves, producing a visual record called a seismogram.
Question 79 Discuss
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What is the value of 1 electron volt (eV), which is especially used for nuclear science?

A
1.202 ×10−15 joules
B
2.202 × 10−11 joules
C
1.602 ×10−19 joules
D
1.902 ×10−10 joules

Answer & Explanation

Correct Option: C

An electronvolt is the amount of kinetic energy gained by a single electron accelerating through an electric potential difference of one volt.
Question 80 Discuss
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Why are the handles of cooking pans often covered with wood or plastic?

A
Wood is a good conductor of heat and helps in cooking.
B
Wood adds nice flavours to the food being cooked.
C
Wood is an insulator and does not heat up.
D
Wood helps the food cook faster.

Answer & Explanation

Correct Option: C

Wood and plastic are poor conductors of heat, ensuring the handles remain cool enough to touch even while the pan is hot.
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