Waec Physics 2019 Past Questions and Answers

Question 16:

• WAEC 2019

The area under a velocity-time graph represents

A. Speed
B. Acceleration
C. Moment
D. Distance

Question 17:

• WAEC 2019

Which of the following statements about a neutral atom is correct? The

A. Core is composed of electrons and protons
B. Number of electrons is equal to that of neutron
C. Number of neutrons is equal to that of protons
D. Number of protons is equal to that of electrons.

Question 18:

• WAEC 2019

Which of the following properties is not exhibited by sound waves

A. Diffraction
B. Polarization
C. Interference
D. Reflection

Question 19:

• WAEC 2019

When ultraviolet light is incident on certain metallic p articles are emitted. These particles are called

A. Positrons
B. Protons
C. Photoelectrons
D. Photons

Question 20:

• WAEC 2019

The graph above illustrates the variation of temperature \(\theta\) with time (t) for a solid that is being heated. Which processes take place at segments P and Q respectively?

A. Freezing and vaporization
B. Evaporation and solidification
C. Melting and boiling
D. Condensation and evaporation