Physics Past Questions And Answers
State two effects to show (a) the existence of matter waves;
(b) that radiation behaves like particles.
View Discussion (0)WAEC 2007 THEORYName one use of 'LASER' in each of the following areas:
(a) communication;
(b) medicine;
(c) security
View Discussion (0)WAEC 2013 THEORYThe energy stored in a capacitor of capacitance 10μF carrying a charge of 100μC
- A. 5 x 104 J
- B. 4 x 102 J
- C. 4 x 10-3 J
- D. 5 x 10-4 J
The volume of a fixed mass of a gas varies inversely as the pressure on it provided the temperature is constant. This statement is
- A. Pressure law
- B. Charles law
- C. Boyle's law
- D. General gas law
Which of the following statements about the properties of the electric field produced by charged parallel plates is not correct?
- A. The electric field in the region outside the parallel plate is zero, except for the edge effects
- B. The magnitude of the electric field strength at any point between the plates, except near the edges, depends on the magnitude of the charge on each plate.
- C. The magnitude of the electric field strength at any point between the plates is directly proportional to the magnitude of the charge on each plate.
- D. The electric field is uniform everywhere in the space between the parallel plates
A quantity of ice at 10oC is heated until the temperature of the heating vessel is 90oC. Which of the following constants is NOT required to determine the quantity of heat supplied to the vessel?
- A. specific heat capacity of ice
- B. specific heat capacity of water
- C. specific latent heat of fusion
- D. specific latent heat of vaporization
An object is placed 20.0cm in front of a converging lens of focal length 15.0cm. Calculate its image distance
- A. 1.3cm
- B. 8.6cm
- C. 35.0cm
- D. 60.0cm
Total internal reflection occurs when light moves from
- A. a dense medium to a less dense medium
- B. air to water
- C. water to glass
- D. a less dense to a dense medium
An insulated rod when rubbed with a material acquires
- A. a negative charge if it is made of glass and rubbed with silk
- B. no charge if it is made of glass and rubbed with fur
- C. no charge if it is made of copper and rubbed with silk
- D. a positive charge if it is made of copper and rubbed with fur
The mass of a stone is 15.0g when completely immersed in water and 10.0g when completely immersed in a liquid of relative density 2.0. The mass of the stone in air is
- A. 5.0g
- B. 12.0g
- C. 20.0g
- D. 25.0g