Physics Past Questions and Answers

The pitch of an acoustic device can be increased by

A Decreasing the loudness
B Increasing the intensity
C Increasing the frequency
D Decreasing the intensity

Question 2022:

One of the features of the fission process is that

A It leads to chain reaction
B Its products are not radioactive
C Neutrons are not released
D The of the masses of the reactants equals the sum of the masses of the products

Question 2023:

The linear expansivity of brass is 2 x 10\(^{-5}\) C\(^{-1}\). If the volume of a piece of brass is 15.00cm at 0°C, what is the volume at 100°C

A 16.03cm\(^3\)
B 15.09cm\(^3\)
C 16.00cm\(^3\)
D 15.03cm\(^3\)

Question 2024:

A lead bullet of mass 0.05 kg is fired with a velocity of 200 m/s into a lead block of mass 0.95 kg. Given that the lead block can move freely, the final kinetic energy after impact is

A 100J
B 150J
C 50J
D 200J

Question 2025:

In a series R-L-C circuit at resonance, the voltages across the resistor and the inductor are 30V and 40V respectively. What is the voltage across the capacitor?

A 30V
B 70V
C 50V
D 40V