Past Questions And Answers
The sagging of overhead electrical wires is caused by
- A. radiation of heat.
- B. rough handling.
- C. gravitational attraction
- D. Linear expansion
Granite rocks contain
- A. silica,aluminium and iron
- B. silica,iron and magnesium
- C. iron and manganese
- D. silica and bauxite
a. In the diagram below P, Q, R, and S are points on the circle with centre O.
QR // OS , ∠QOR = 2m, ∠QPR = n and ∠SOR = 54°. Find the values of m and n.
b. The length of a rectangle is 4 cmmore than the width. If the perimeter is 40 cm, find the area.
View Discussion (0)WAEC 2023 THEORYHow many moles of (H+) are there in 1 dm3 of 0.5 M solution of H2SO4?
- A. 2.0 moles
- B. 1.0 moles
- C. 0.5 mole
- D. 0.25 mole
In BCD encoding system, 25, will be represented as?
- A. 01100101
- B. 01010110.
- C. 00100101.
- D. 0101001.
A 0 - 10mA galvanometer with a coil resistance of 30\(\Omega\) can be converted to a 0 - 10A ammeter by using
- A. 0.03\(\Omega\) series resistor
- B. 0.03\(\Omega\) shunt resistor
- C. 9.99\(\Omega\) shunt resistor
- D. 9.99\(\Omega\) series resistor
Explain why water in a narrow glass tube has a concave meniscus while mecury in the same tube, has a convex meniscus
View Discussion (0)WAEC 2006 THEORYWhich of the following statements about asexual reproduction is correct? It
- A. always involves one parent but the offspring is genetically different from the parent.
- B. may involve two parents but the offspring is always identical to one parent
- C. always involves one parent and the offspring is genetically identical to the parent
- D. involves two parents but the offspring is not genetically identical to any of the parents
In the internal structure of plants, a wide pith in the centre is common to
- A. dicot stems and monocot stems
- B. dicot stem and monocot roots
- C. dicot roots and monocot roots
- D. dicot roots and monocot stems
(a) Copy and complete the table of values for \(y = 1 - 4\cos x\).
| x | 0° | 30° | 60° | 90° | 120° | 150° | 180° | 210° | 240° | 270° | 300° |
| y | -3.0 | 1.0 | 4.5 | -1.0 |
(b) Using a scale of 2cm to 30° on the x- axis and 2cm to 1 unit on the y- axis, draw the graph of \(y = 1 - 4\cos x\) for \(0° \leq x \leq 360°\).
(c) Use the graph to : (i) solve the equation \(1 - 4\cos x = 0\) ; (ii) find the value of y when x = 105° ; (iii) find x when y = 1.5.
View Discussion (0)WAEC 2012 THEORY.jpg)