2007 - WAEC Physics Past Questions and Answers - page 4
A rectangular glass prism of thickness d and absolute refractive index n is placed on a point object which is viewed vertically downward from above the prism. Which of the following expressions correctly defines the apparent upward displacement of the object?
Which of the following factors can affect the speed of sound in air? i. The temperature of the surrounding ii. The direction of the wind iii. The pitch of the sound.
A sounding tuning fork is brought near the open end of a pipe containing air and the loudness of the sound is observed to increase. This observation is due to
Which of the following statements about sound wave is not correct? Sound waves can be
A dry plastic comb used in combing hair was found to attract pieces of paper and dust. The most probable explanation for this phenomenon is that the comb has been given
Which of the following statements is correct about resonance? Resonance occurs when a body
Which of the following components is used for storing electric charges?
Which of the following operations does not represent an action of a force field?
A bulb marked 240V, 40W is used for 30 minutes. Calculate the heat generated
Five 80-W and three 100W are run for 8 hours. If the cost of energy is N5.00 per unit, calculate the cost of running the lamp. [1 unit = 1 kWh]