EmSAT Physics

Question 1

According to Newton's Second Law of Motion, what happens to acceleration if the net force is doubled while mass remains constant?

Accepted Answer

Acceleration is doubled

Answer

Newton's Second Law states F = ma. If force doubles and mass stays constant, acceleration must also double since a = F/m.

Question 2

What is the SI unit of electrical resistance?

Accepted Answer

Ohm

Answer

The ohm (Ω) is the SI unit of electrical resistance, named after Georg Simon Ohm. It is defined as the resistance between two points when one volt produces one ampere of current.

Question 3

What type of energy transformation occurs in a solar panel?

Accepted Answer

Light (radiant) to electrical

Answer

Solar panels (photovoltaic cells) convert light energy (electromagnetic radiation from the sun) into electrical energy through the photovoltaic effect.

Question 4

What is the speed of a car that travels 150 km in 3 hours?

Accepted Answer

50 km/h

Answer

Speed = distance / time = 150 km / 3 hours = 50 km/h.

Question 5

Which of the following is an example of a longitudinal wave?

Accepted Answer

Sound wave

Answer

Sound waves are longitudinal waves where the particles of the medium vibrate parallel to the direction of wave propagation, creating compressions and rarefactions.

EmSAT Practice Test

EmSAT Practice Test

EmSAT Physics