Physics 2016 Waec Past Questions and Answers

Question 21 :

• WAEC 2016

The continuous stirring in the method of mixtures to determine the specific thermal capacity of a substance ensures

A. Continuous dissipation of heat to the room
B. Uniform distribution of thermal energy to all parts of the mixture
C. That the thermal energy is confined to the mixture
D. That there is rapid heat exchange

Question 22 :

• WAEC 2016

Which of the following statements is correct about the effect of dissolved salt on the freezing point of water?

A. The freezing point is lowered
B. The freezing point is increased
C. There is no change in the freezing point
D. The change in the freezing point depends on the temperature of the surrounding

Question 23 :

• WAEC 2016

A pressurized perfume bottle is left on the window pane of a room. What happens to he gas molecules of the perfume on a sunny day? They

A. Expand
B. Collide less often
C. Move more rapidly
D. Contract

Question 24 :

• WAEC 2016

Given that v, f and \(\lambda\) are the velocity, frequency and wavelength of a wave respectively. Which of the following equations is correct?

A. V = f²\(\lambda\)
B. F = \(\frac{v}{\lambda}\)
C. F = \(\frac{v}{\lambda^2}\)
D. \(\lambda = \frac{f}{v^2}\)

Question 25 :

• WAEC 2016

The distance between two successive trough of a wave is 0.4m. If the frequency of the source is 825Hz, Calculate the speed of the wave

A. 165.0 ms^-1
B. 330.0ms^-1
C. 41.5ms^-1
D. 85.0ms^-1