Physics Past Questions And Answers
Which property of a wave remains constant when the wave travels from one medium into another?
- A. Amplitude
- B. Wavelength
- C. Velocity
- D. Frequency
A simple cell with mercury-amalgamated zinc electrode prevents
- A. local actions
- B. polarization
- C. buckling
- D. degradation
The nucleon and proton numbers of a neutral atom of an element are 238 and 92 respectively. Determine the number of neutrons in the atom.
- A. 119
- B. 330
- C. 165
- D. 146
An organic pipe closed at one end is 80cm long. Determine the frequency of the fundamental note assuming that the speed of sound in air is 340ms-1
- A. 106Hz
- B. 213Hz
- C. 318Hz
- D. 425Hz
An alternating current with a frequency of 100HZ has a period of
- A. 0.03sec
- B. 0.01sec
- C. 0.04sec
- D. 0.15sec
The radioisotope23592U decays by emitting two alpha particles, three beta particles and a gamma ray. What is the mass and atomic number of the resulting element?
- A) 215 and 88
- B) 91 and 227
- C) 227 and 91
- D) 92 and 238
What is the total energy stored by the capacitors?
- A. 2.0 x 10-4J
- B. 1.0 x 10-4J
- C. 9.0 x 10-2J
- D. 1.0 x 10-2J
A lead bullet of mass 0.05 kg is fired with a speed of 200 m/s into a lead block of mass 0.95 kg at rest. Given that the lead block moves after the impact, determine its kinetic energy.
- A. 150J
- B. 200J
- C. 50J
- D. 100J
A ray of light passing through the centre of curvature of a concave mirror is reflected by the mirror at
- A. 0o
- B. 45o
- C. 90o
- D. 180o
If an object is placed at a height of tem above the ground at a stationary point. It posses what types of energy?
- A. Mechanical energy
- B. Stationary energy
- C. Potential energy
- D. Vibrational energy