CDS Physics and Science

Question 1

What is Newton's second law of motion?

Accepted Answer

Force equals mass times acceleration (F = ma)

Answer

Every action has an equal and opposite reaction

Answer

An object at rest stays at rest

Answer

Energy is conserved

Question 2

What is the SI unit of electric current?

Accepted Answer

Ampere

Answer

Volt

Answer

Ohm

Answer

Watt

Question 3

The speed of light in vacuum is approximately how many km/s?

Accepted Answer

300,000 km/s

Answer

150,000 km/s

Answer

500,000 km/s

Answer

200,000 km/s

Question 4

Which gas is produced when zinc reacts with dilute sulphuric acid?

Accepted Answer

Hydrogen

Answer

Oxygen

Answer

Carbon dioxide

Answer

Nitrogen

Question 5

What does DNA stand for?

Accepted Answer

Deoxyribonucleic Acid

Answer

Diribonucleic Acid

Answer

Deoxyribonitric Acid

Answer

Dioxyribonucleic Acid

Question 6

Which phenomenon explains why the sky appears blue?

Accepted Answer

Rayleigh Scattering

Answer

Reflection

Answer

Refraction

Answer

Diffraction