Waec Physics 2001 Past Questions and Answers

Question 16:

• WAEC 2001

a beam PQ pivoted at P carries a load of 80N as shown above. Calculate the effort E, required to keep it horizontal. [neglect the weight of the beam]

A. 32.0N
B. 26.7N
C. 16.0N
D. 13.3N

Question 17:

• WAEC 2001

A resistance thermometer has a resistance of 20\(\Omega\) at 0^oC and 85\(\Omega\) at 100^oC. If its resistance is 52\(\Omega\)in a medium, calculate the corresponding temperature

A. 49.2^oC
B. 60.6^oC
C. 80.0^oC
D. 84.7^oC

Question 18:

• WAEC 2001

A given mass of an ideal gas has a pressure of 500Nm^-2 at -13^oC. If its volume remains constant. Calculate its pressure at 247^oC.

A. 25Nm^-2
B. 50Nm^-2
C. 500Nm^-2
D. 1000Nm^-2

Question 19:

• WAEC 2001

The volume of an ideal gas at a pressure of 77cmHg and temperature 60^oC is 24cm³. If the temperature and pressure are increased to 98^oC
and 81cmhg respectively, calculate the new volume of the gas

A. 411.5cm³
B. 267.1cm³
C. 254.2cm³
D. 112.7cm³

Question 20:

• WAEC 2001

The amount of heat given out or absorbed when a substance changes its state at a constant temperature is known as

A. Latent heat
B. Heat capacity
C. Specific latent heat
D. Specific heat capacity