Past Questions And Answers
(a) What is photosynthesis?
(b) List: (i) four external factors
(ii) two internal factors; that affect the rate of photosynthesis.
(c)(i)List the major products of the light dependent stage of photosynthesis.
(ii)State the importance of each of the products listed in (c)(i) above.
(d)(i) Explain why there are no green plants at the lower depths of some lakes.
(ii) State why decomposers are important to flowering plants.
View Discussion (0)WAEC 2013 THEORYThe tendency for firms and individuals to concentrate on the activity which is of most advantage of them is known as?
- A. decentralization
- B. diversification
- C. commercialization
- D. specialization
The founder of the MAHDIA (MAHDIYA) MOVEMENT is?
- A. Muhammed Ahmad
- B. Abubakar Bello
- C. Muhammed Bello
- D. Uthmna Dan Fodio
A character that is built around a single idea or quality is a _______ character.
- A. heroic
- B. flat
- C. choral
- D. sound
The _____ conference of 1950 discussed the provisions of the Macpherson's constitution.
- A. London
- B. Ibadan
- C. Lagos
- D. Calabar
The characteristic symptoms of mosaic disease of crops is usually observed on
- A. roots
- B. leaves
- C. stems
- D. fruits
The term federal character was popularized by the
- A. 1975 Constitution Drafting Committee
- B. 1979 Constitution
- C. Murtala / Obasanjo regime
- D. Buhari regime
An object is said to undergo oscillatory motion when it moves
- A. in an erratic manner
- B. to and fro about a fixed point
- C. in a circular path
- D. along a continuous path from the starting point
Which of these is not a physical property of metals?
- A) electrical conductivity
- B) lustre
- C) ductile
- D) resistant
(a) With the aid of a simple diagram, explain how a step down transformer works.
(b)(i) State three ways by which energy is lost in a transformer
(ii) Mention how each of the losses in (b)(i) above can be minimized
(c) A 95% efficient transformer is used to operate a lamp rated 60W, 220 V from a 4400 V a.c supply. Calculate the;
(i) ratio of the number of turns in the primary coil to the number of turns in the secondary coil of the transformer
(ii) current taken from the main circuit.
View Discussion (0)WAEC 2007 THEORY.jpeg)