ESAT ESAT Physics 3

Question 1

What is the half-life concept in radioactive decay as tested in ESAT?

Accepted Answer

Time for half the nuclei to decay

Answer

Time for all nuclei to decay

Answer

Time for the activity to double

Answer

Time for half the mass to be lost as energy

Question 2

Which type of electromagnetic radiation has the highest frequency?

Accepted Answer

Gamma rays

Answer

X-rays

Answer

Ultraviolet

Answer

Microwaves

Question 3

A projectile is launched horizontally from a cliff. Which quantity remains constant throughout its flight (ignoring air resistance)?

Accepted Answer

Horizontal velocity

Answer

Vertical velocity

Answer

Speed

Answer

Kinetic energy

Question 4

What does Faraday's law of electromagnetic induction state?

Accepted Answer

EMF is proportional to the rate of change of magnetic flux

Answer

Current is proportional to voltage

Answer

Force on a charge equals qvB

Answer

Magnetic field lines form closed loops

Question 5

In ESAT Physics, what is the principle of superposition for waves?

Accepted Answer

The resultant displacement is the sum of individual displacements

Answer

Waves cancel each other out completely

Answer

Waves speed up when they overlap

Answer

Wave frequency doubles when two waves meet

Question 6

What is the ideal gas law?

Accepted Answer

PV = nRT

Answer

PV = nT

Answer

P = nRT/V²

Answer

PV² = nRT