Physics Past Questions

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711

The eye defect illustrated by the diagram above is

A. astigmatism
B. long sightedness
C. loss accommodation
D. short sightedness
E. colour blindness

View Answer & Discuss (4) WAEC 1990

712

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?

A. 10m
B. 20m
C. 30m
D. 40m
E. 60m

View Answer & Discuss (5) WAEC 1990

713

Which of the following pairs of light rays shows the widest separation in the spectrum of white light?

A. Yellow and red
B. Orange and green
C. Violet and blue
D. Blue and green
E. Red and indigo

View Answer & Discuss WAEC 1990

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714

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?