Jamb Physics 2010 Past Questions and Answers

Question 16:

• JAMB 2010

A vapour is said to be saturated when

A. A dynamic equilibrium exists between liquid molecules and the vapour molecules
B. A dynamic aquilibrium exists such that more molecules return to the liquid than are living it
C. The temperature of the vapour varies
D. The vapour pressure is atmospheric

Question 17:

• JAMB 2010

The pressure of one mole of an ideal gas of volume 10^-2 m³ at a temperature of 27°c is
[molar gas constant = 8.3 J mol^-1 k^-1]

A. 2.49 x 10⁴ Nm^-2
B. 2.24 x 10⁴ Nm^-2
C. 2.49 x 10⁵ Nm^-1
D. 2.24 x 10⁵ Nm^-1

Question 18:

• JAMB 2010

Which of the following has no effect on radiation?

A. Nature of surface
B. Density
C. Surface area
D. Temperature

Question 19:

• JAMB 2010

The wavelength of a wave traveling with a velocity of 420 ms^-1 is 42 m. what is its period?

A. 1.2 s
B. 1.0 s
C. 0.5 s
D. 0.1 s

Question 20:

• JAMB 2010

The sound of an electricity bell dies down slowly when air is slowly pumped out from a bottle because

A. The wavelength of sound becomes greater in the bottle
B. Sound cannot pass through the bottle
C. Sound needs a material medium
D. Sound can pass through a vacuum