Jamb Physics 1986 Past Questions and Answers

Question 11:

• JAMB 1986

A 1000kg elevator is descending vertically with an acceleration of 1.0ms^-2, if the acceleration due to gravity is 10ms^-2, the tension in the suspending cable is

A. 1.0N
B. 10.0N
C. 9000.0N
D. 11 000N

Question 12:

• JAMB 1986

The mode of heat transfer which does not require a material medium is

A. Conduction
B. Radiation
C. Convection
D. Propagation

Question 13:

• JAMB 1986

The expansion of solids can be considered a disadvantage in the

A. Balance wheel of a watch
B. Fitting of wheels on rims
C. Fire alarm
D. Thermostat

Question 14:

• JAMB 1986

The specific latent heat of fusion of lead is the amount of heat required to

A. Melt lead at its melting point
B. Heat a unit mass of lead through 1^oC
C. Change the state of a unit mass of lead at its melting point
D. Change the state of a unit mass of lead at its boiling point

Question 15:

• JAMB 1986

Which of the following is common to evaporation and boiling? They

A. Take place at any temperature
B. Are surface phenomena
C. Involve change of state
D. Take place at a definite pressure