Physical Science

6 questions available

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All Physics 6 Chemistry 268 Elements & Compounds 4 Atoms & Molecules 6 Chemical Reactions 3 Acids & Bases Metals & Non-Metals 2 Scientific Laws 1
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Q1.Mass of photon is equal to?

Medium
A 1
B Zero
C 0.5
D infinite
Physics PPSC 2026

Correct Answer: B

A photon has zero rest mass and travels at the speed of light.

Q2.Pressure of a gas at constant volume increases due to an increase in?

Medium
A Valume
B Temperature
C Mass
D Density
Physics PPSC 2026

Correct Answer: B

According to Gay-Lussac's Law, gas pressure increases with temperature at constant volume.

Q3.Nuclear fission is caused by the impact of?

Medium
A Deuton
B Proton
C Neutron
D Electron
Physics PPSC 2026

Correct Answer: C

Nuclear fission is triggered when a neutron strikes the nucleus of a heavy atom.

Q4.Electromagnetic radiation with maximum wavelength is:

Medium
A Ultraviolet
B Radio waves
C Infrared
D None of these
Physics CSS 2026

Correct Answer: B

Among electromagnetic radiations, radio waves have the longest (maximum) wavelength.

Q5.The most dangerous type of radiation is:

Medium
A Alpha radiation
B Beta radiation
C Gamma radiation
D None of these
Physics CSS 2026

Correct Answer: C

Gamma radiation has the highest energy and penetrating power, making it the most dangerous type of radiation.

Q6.What does an anemometer measure?

Easy
A Wind speed
B Air Pressure
C Water Pressure
D None of these
Physics PPSC 2021

Correct Answer: A

An Anemometer measures Wind Speed.