Physics Past Questions And Answers
From the principle of flotation, a body sinks in a fluid until it displace a quantity equal to its own?
- A. density
- B. mass
- C. weight
- D. volume
A positively charged particle is placed near a negatively charged particle. What is the direction of the electric force between the two particles?
- A. The electric force is directed from the negative particle to the positive particle.
- B. The electric force is zero.
- C. The direction of the electric force cannot be determined.
- D. The electric force is directed from the positive particle to the negative particle.
Calculate the absolute pressure at the bottom of a lake at a depth of 32.8 m. Assume the density of the water is 1 x 10-3 kgm-3 and the air above is at a pressure of 101.3 kPa.
[Take g = 9.8 ms-2]
- A. 422.7
- B. 220.14
- C. 464.53
- D. 321.74
A few grains of table salt were put in a cup of cold water, kept at constant temperature and left undistributed. Eventually all the water tested salty. This action is due to?
- A. convection
- B. osmosis
- C. capillarity
- D. diffusion
An object 40cm high is 30cm from the pin hole camera. If the height of the image formed is 20cm. What is the distance of the image from the pin height?
- A. 15cm
- B. 70cm
- C. 40cm
- D. 30 cm
In a resonance tube experiment, if the fundamental frequency of the vibrating air column is 280Hz, the frequency of the third overtone is
- A. 70Hz
- B. 840Hz
- C. 1120Hz
- D. 1960Hz
A ball is projected specific latent heat of ice = 3.4 x 10\(^{2}\) Jg\(^{-1}\) horizontally from a height of 20m above the ground specific heat capacity of water = 4.2 Jg\(^{-1}\) K\(^{-1}\) with an initial velocity of 0.4ms\(^{-1}\). Calculate the horizontal distance moved by the ball before hitting the ground. [g = 10ms\(^{-1}\)]
View Discussion (0)WAEC 2002 THEORYUnder constant tension and constant mass per unit length, the note produced by a plucked string is 500Hz when the length of the string is 0.90m. At what length is the frequency 150Hz?
- A. 3m
- B. 4m
- C. 5m
- D. 6m
In the study of Physics, temperature and heat are often confused with each other. Which of the following statements correctly defines these two elements?
- A. Temperature is a measure of the average kinetic energy of the molecules of a substance
- B. Heat is a measure of the total kinetic energy of the molecules in a system
- C. Different materials require different amounts of heat to cause a given change in temperature
- D. All of the above
A ray undergoes a minimum deviation at 40° when it is incident on equilateral triangular glass prism. Calculate the refractive index of the prism
- A. 1.48
- B. 1.50
- C. 1.53
- D. 1.67