CDS Physics and Science 1

Question 1

What is Newton's second law of motion?

Accepted Answer

Force equals mass times acceleration (F = ma)

Answer

Newton's second law states that force equals mass multiplied by acceleration: F = ma.

Question 2

What is the SI unit of electric current?

Accepted Answer

Ampere

Answer

The Ampere (A) is the SI unit of electric current, defined as the flow of one coulomb per second.

Question 3

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

Accepted Answer

300,000 km/s

Answer

The speed of light in vacuum is approximately 300,000 km/s (3 × 10⁸ m/s).

Question 4

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

Accepted Answer

Hydrogen

Answer

When zinc reacts with dilute H₂SO₄, zinc sulphate and hydrogen gas are produced: Zn + H₂SO₄ → ZnSO₄ + H₂.

Question 5

What does DNA stand for?

Accepted Answer

Deoxyribonucleic Acid

Answer

DNA stands for Deoxyribonucleic Acid, the molecule that carries genetic information in living organisms.

CDS - Combined Defence Services