EmSAT Physics 2

Question 1

What is the potential energy of a 5 kg object at a height of 10 meters? (g = 10 m/s²)

Accepted Answer

500 J

Answer

50 J

Answer

100 J

Answer

250 J

Question 2

Which law of thermodynamics states that energy cannot be created or destroyed?

Accepted Answer

First Law

Answer

Zeroth Law

Answer

Second Law

Answer

Third Law

Question 3

What happens to the current in a circuit if the resistance is tripled and voltage remains constant?

Accepted Answer

Current is reduced to one-third

Answer

Current triples

Answer

Current remains the same

Answer

Current is reduced to one-ninth

Question 4

What is the net force on an object moving at constant velocity?

Accepted Answer

Zero

Answer

Equal to its weight

Answer

Equal to the applied force

Answer

Equal to friction force

Question 5

What is the focal length of a converging lens if an object at 30 cm produces an image at 15 cm?

Accepted Answer

10 cm

Answer

45 cm

Answer

15 cm

Answer

20 cm

Question 6

Which electromagnetic wave has the highest frequency?

Accepted Answer

Gamma rays

Answer

Radio waves

Answer

Infrared

Answer

Visible light