Physics Past Questions

Exam Type:

Exam year:

Question Type:

Topics:

Clear Selections
Change Subject Post a Question Check Syllabus Study My Bookmarks Past Questions Videos Watch Video Lessons Download App

Post-UTME Past Questions - Original materials are available here - Download PDF for your school of choice + 1 year SMS alerts

WAEC and NECO CBT Software for Computers and Laptops - Candidates, Schools, Centres, Resellers - 100% Offline -Download Now

Your School's Whatsapp Group - Join Us now

1531

The resistances of platinum wire at the ice and steam points are 0.75 ohm and 1.05 ohm respectively. Determine the temperature at which the resistance of the wire is 0.90 ohm

A. 43.0^oC
B. 50.0^oC
C. 69.9^oC
D. 87.0^oC

View Answer & Discuss (3) JAMB 1990

1532

A bar of initial length /₀ is heated through a temperature change \(\Delta\)t to a new length I. The linear expansivity, a, of the bar is

A. \(\frac{/ - /_o}{/ \Delta t}\)
B. \(\frac{/ - /_o}{/_o \Delta t}\)
C. /_o(1 + \(\Delta\) t)
D. \(\frac{/ - /_o}{/(1 + \Delta t)}\)

View Answer & Discuss (4) JAMB 1990

1533

The pressure of a gas when cooled at constant volume will decrease because the molecules

A. collide less frequently with the walls of the container
B. have the same average kinetic energy
C. break up into smaller molecules
D. decrease in number

View Answer & Discuss (2) JAMB 1990

1534

1kg of copper is transferred quickly from boiling water to a block of ice. Calculate the mass of ice melted, neglecting heat loss. [specific heat capacity of copper 400Jkg^-1K^-1 and latent heat of fusion of ice 333 x 10³Jkg^-1]