Physics 1995 Jamb Past Questions and Answers

Question 11 :

• JAMB 1995

A hydraulic press has a large circular piston of radius 0.8m and a circular plunger of radius 0.2m. A force of 500N is exerted by the plunger. Find the force exerted on the piston

A. 8000N
B. 4000N
C. 2000N
D. 31N

Question 12 :

• JAMB 1995

The volume of an air bubble increases from the bottom to the top of a lake at constant temperature because

A. Atmospheric pressure acts on the surface of the lake
B. Pressure increases with depth
C. Density remains constant with pressure
D. The bubble experiences an upthrust

Question 13 :

• JAMB 1995

Temperature is the measure of the

A. Quantity of heat transferred into the molecules of an object
B. Mean kinetic energy of the molecules of the object
C. Kinetic energy of any individual molecule of the substance
D. Amount of work done by the molecules of the object

Question 14 :

• JAMB 1995

A rectangular metal block of volume 10^-6m³ at 273k is heated to 573k. If its coefficient of linear expansion is 1.2 x 10^-5k^-1, the percentage change of it volume is

A. 1.5%
B. 1.1%
C. 0.4%
D. 0.1%

Question 15 :

• JAMB 1995

A piece of wood floats inside water at room temperature with a fraction of it above the liquid surface. As the temperature of the water is raised, the part of the wood above the liquid will

A. Decrease because the density of water decreases with temperature
B. Increase because the density of water decreases with temperature
C. Decreases because the density of water increases with water temperature
D. Increase because the density of water increases with temperature