The diagram above represents a transverse travelling wave. Which two points are 180° out of phase?
A and E
B and D
C and F
D and H
Correct answer is D
No explanation has been provided for this answer.
To obtain a virtual, erect and magnified image from a thin converging lens, an object must be placed
between the focus and the lens
at the focus
between the focal length and twice the focal length
beyond twice the focal length
Correct answer is A
When the object is placed between the optical centre of the lens and the focal length, the image formed is virtual, erect and magnified.
10.0N
20.0N
40.0N
50.0N
Correct answer is C
No explanation has been provided for this answer.
1358mm
957mm
760mm
638mm
Correct answer is D
Let \(h_{Q}\) and \(\rho_{Q}\) be the least length and the density of \(Q_{1}\)
while \(h\) and \(\rho\) are the length and density of mercury respectively.
\(h\times \rho \times g = h_{Q} \times \rho_{Q} \times g\)
\(76cm \times 13.6 \times 10 = h_{Q} \times 16.2 \times 10\)
\(h_{Q} = \frac{76\times13.6\times10}{16.2\times10}\)
\(h_{Q} = \frac{10336}{162}\)
\(h_{Q} \approxeq 63.8cm = 638mm\)
Which electrical device is illustrated above?
a.c. generator
a.c. motor
d.c. generator
d.c. motor
Correct answer is C
No explanation has been provided for this answer.
WAEC Subjects
Aptitude Tests