Waec Physics 2014 Past Questions and Answers

Question 16:

• WAEC 2014

A screw-jack has the distance between its successive threads as P and the length of its tommy bar as r. Its velocity ratio is given by the expression

A. \(\frac{2 \pi r^2}{P}\)
B. \(\frac{2 \pi r}{P}\)
C. \(\frac{2 \pi}{rp}\)
D. \(\frac{P}{2 \pi r}\)

Question 17:

• WAEC 2014

Heat transfer by conduction is similar to wave motion because

A. There is increase in temperature
B. Transfer of materials is involved
C. Charged particles vibrates at right angles
D. No transfer of materials is involved

Question 18:

• WAEC 2014

The temperature at which the water vapor in the air saturates the air and begins to condense is known as

A. Dew point
B. Critical point
C. Boiling point
D. Triple point

Question 19:

• WAEC 2014

The change of state from solid to liquid occurs

A. At constant temperature
B. When temperature is lower than the boiling point
C. When temperature is just near freezing point
D. When temperature is equal to the boiling point

Question 20:

• WAEC 2014

Which of the following types of thermometers can be used to measure a range of temperature from -50°C to 50°? i. Clinical ii. Mercury iii. Alcohol-in-glass

A. I only
B. Ii only
C. Iii only
D. I and ii only