Waec Physics 1990 Past Questions and Answers

Question 1:

• WAEC 1990

Which of the following instruments is suitable for making the most accurate measurement of the internal diameter of a test tube?

A. Metre rule
B. A pair of callipers
C. A micrometer screw gauge
D. A tape rule
E. A set square

Question 2:

• WAEC 1990

Which of the following instruments is suitable for making the most accurate measurement of the internal diameter of a test tube?

A. Metre rule
B. A pair of callipers
C. A micrometer screw gauge
D. A tape rule
E. A set square

Question 3:

• WAEC 1990

A particle of mass 2.5 x 10^-6kg revolving around the earth has a radial acceleration of 4 X 10⁷ ms^-2. What is the centripetal force of the particles?

A. 6.25 x 10^-14N
B. 1.60 x10^-13N
C. 5.00 x 10N
D. 1.00x10²N
E. 2.00x1O²N

Question 4:

• WAEC 1990

An oscillating pendulum has a velocity of 2ms^-1 at the equilibrium position O and velocity at same point P. Using the diagram above, calculate the height of P above O. (Take g = 10ms²)

A. 5.0m
B. 2.0m
C. 0.4m
D. 0.2m
E. 0.1m

Question 5:

• WAEC 1990

Which of the following are contact forces? I. Force of tension II. Force of fiction, III. Magnetic force III Force of reaction.

A. I,II and III only
B. I, II and IV only
C. I, III and IV only
D. II, III and IV only
E. L and IV only.