Past Questions And Answers
In doping an intrinsic semiconductor to produce a p-type semiconductor,
- A. the semiconductor is heated up
- B. a donor element is added
- C. an acceptor element is added
- D. the semiconductor is conducted to a battery
Quantities in the proportions 1, 4, 6, 7 are to be represented in a pie chart. Calculate the angle of the sector with proportion 7
- A. 20°
- B. 80°
- C. 120°
- D. 140°
Select the option that best explains the information conveyed in the sentence.
The solution lies in choosing between various negative alternatives?
- A. the solution can be found in one of negative options
- B. the solution lies in choosing between the positively and the negative and the negative
- C. the solutions are many
- D. the solution is a negative one
From the words lettered A to D, choose the word that best completes each of the following sentences.
At Christmas, employees of the Sugar Factory receive huge ________
- A. benefits
- B. dividends
- C. bonuses
- D. salaries
If grains are not properly dried before storage, they are likely to
- A. lose viability at a fast rate
- B. remain domant for a long time
- C. synthesize carbohydrate during storage
- D. germinate faster when planted in the field
An aeroplane flies from a town P(lat. 40°N, 38°E) to another town Q(lat. 40°N, 22°W). It later flies to a third town T(28°N, 22°W). Calculate the :
(a) distance between P and Q along their parallel of latitude ;
(b) distance between Q and T along their line of longitudes;
(c) average speed at which the aeroplane will fly from P to T via Q, if the journey takes 12 hours, correct to 3 significant figures. [Take the radius of the earth = 6400km ; π=3.142]
View Discussion (0)WAEC 1990 THEORYThe good shepherd as described by St. John has all the following qualities except that
- A) He enters the sheepfold by the door
- B) He climbs into the sheepfold by another way
- C) He leads the sheep out by the door
- D) The gatekeeper opens the gate for him
Soil erosion by action of rain can be caused by all of the following except
- A. tropical rainstorms
- B. scanty vegetation
- C. steep slopes
- D. aridity
Which of the following is not present in the nucleus of a cell?
- A) Chromosomes
- B) Nucleolus
- C)Mitochondrion
- D)Genes
The Lagos area has emerge as the most prominent destination for internal migration because it is?
- A. close to the coast and is densely populated
- B. agriculturally production and close to coast
- C. on a high plain and is highly industrialized
- D. highly industrialized and highly urbanized

