Physics Past Questions and Answers

The sensitivity of a thermometer is

A All of the above
B How quickly a temperature change can be detected
C The difference between the maximum and the minimum temperature
D The smallest temperature change that can be detected or measured

Question 7:

The diagram above illustrates the penetrating power of some types of radiation. X, Y and Z are likely

A X = α-particle; Y = γ-ray; Z = β-particle
B X = α-particle; Y = β-particle; Z = γ-ray
C X = γ-ray; Y = α-particle; Z = β-particle
D X = β-particle; Y = γ-ray; Z = α-particle

Question 8:

An explosion occurs at an altitude of 312 m above the ground. If the air temperature is -10.00°C, how long does it take the sound to reach the ground?

[velocity of sound at \(0^oC\) = 331 ms-1]

A 0.94s
B 0.96s
C 0.93s
D 0.95s

Question 9:

A charge of \(4.6 × 10^{-5}\)C is placed in an electric field of intensity \(3.2 × 10^4\) \(Vm^{-1}\). What is the force acting on the electron?

A 1.5 N
B 3.7 N
C 4.2 N
D 2.5 N

Question 10:

The branch of that deals with the motion of objects and the forces acting on them is called:

A Electromagnetism
B Thermodynamics
C Mechanics
D Quantum mechanics