Jamb Physics 2017 Past Questions and Answers

Question 6:

• JAMB 2017

Calculate the upthrust on an object of volume 50cm3 which is immersed in liquid of density 103kgm-3 [g = 10ms-2]

A. 0.8N
B. 2.5N
C. 0.5N
D. 1.0N

Question 7:

• JAMB 2017

Under what conditions are cathode rays produced in a discharge tube?

A. High pressure and low voltage
B. High pressure and high voltage
C. Low pressure and low voltage
D. Low pressure and high volatge

Question 8:

• JAMB 2017

Under which of the following conditions is workdone

A. A man supports a heavy food above his head with his hands
B. A boy climbs onto a table
C. A man pushes unto a table
D. A woman holds a pot of water

Question 9:

• JAMB 2017

Calculate the specific latent heat of vaporization of steam of 1.13 x 106J of heat energy is required to convert 15kg of steam to water.

A. 7.53 x 105 Jkg\(^{-1}\)
B. 7.53 x 10-2Jkg\(^{-1}\)
C. \(7.53 \times 10^{4}\)Jkg\(^{-1}\)
D. 7.53 x 10-3Jkg\(^{-1}\)

Question 10:

• JAMB 2017

A cell of internal resistance 2 π supplies current to a 6 π resistor. The efficiency of the cell is

A. 12.0%
B. 25.0%
C. 33.3%
D. 75.0%