1990 - WAEC Physics Past Questions and Answers - page 4
A parallel beam of light is to be obtained from the headlamp ofa car. At which of the following positions should the source of light be placed from the pole of its spherical minor?
The diagram above shows an incident ray A, inclined at angle of 50o to the interface CB. The ray OB is found to lie along the surface. What is the refractive index of the medium X with respect to air?
The diagram above shows an incident ray A, inclined at angle of 50o to the interface CB. The ray OB is found to lie along the surface. What is the refractive index of the medium X with respect to air?
The eye defect illustrated by the diagram above is
The eye defect illustrated by the diagram above is
A simple microscope forms an image twice the size of the object. If the focal length of the lens of the microscope is 20m, how far is the object from the lens?
Which of the following pairs of light rays shows the widest separation in the spectrum of white light?
Given that the gravitational constant is 7 X 10-11 Nm2kg-2, what is the force of attraction between 106kg mass of lead hanging one metre away from a 103kg mass of iron?
Calculate the current in the 3Ω resistor shown in
the diagram above.
What is the electric potential energy between two protons each of charge q and at a distance of r apart? (Permittivity of free space = εo)