Waec Physics Past Questions For Year 1990
Question 1
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
The diagram above represents a portion of a micrometer screw 20 gauge. What is its reading?
- A. 3.70mm
- B. 3.67mm
- C. 3.50mm
- D. 3.33mm
- E. 3.17mm
Question 3
A plane inclined at an angle at 30o to the horizontal has an efficiency of 50%. The force parallel to the plane required to push a load of 120 N uniformly up the plane is
- A. 40√3N
- B. 60N
- C. 120N
- D. 200N
- E. 240N
Question 4
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.
Question 5
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
