Waec Physics Past Questions
Question 1741
Which of the folowing statements about light travelling from one material medium to another is not correct?
- A. The refracted angle is less than the incident angle if the speed is higher in the first material
- B. Its wavelength does not change
- C. It bends away from the normal if the speed is lower in the first material
- D. Its frequency changes.
Question 1742
Which of the following concepts is a method of heat transfer that does not require a material medium?
- A. Conduction
- B. Diffusion
- C. Convection
- D. Radiation
Question 1743
In which of the following situations is friction not useful?
- A. Operation of a grinding machine
- B. Walking
- C. Application of brakes
- D. Moving piston in a sleeve
Question 1744
The basic principle of operation of a beam balance is------------------
- A. Hooke's law
- B. Archimedes principle
- C. law of flotation
- D. principle of moments
Question 1745
Using venier calipers, which of the following readings gives the correct measurement for the length of a rod?
- A. 4.1 cm
- B. 4.13cm
- C. 125 cm
- D. 1254 cm
