an explosion is observed
the rainbow colours are seen
an emission spectrum is observed
dark lines are observed
Correct answer is C
No explanation has been provided for this answer.
Which of the following electromagnetic wave can be detected by its heating effect?
ultraviolet radiation
x-rays
gamma rays
infrared radiation
Correct answer is D
No explanation has been provided for this answer.
N280.00
N28.00
N7.20
N1.44
Correct answer is B
P = (80 x 5 + 100 x 3)8
= 5600W
Cost = \(\frac{5600}{1000} \times 5 = N28\)
A bulb marked 240V, 40W is used for 30 minutes. Calculate the heat generated
320J
400J
10800J
72000J
Correct answer is D
W = P x t
= 40 x 30 x 60
= 72000J
Which of the following operations does not represent an action of a force field?
falling of a mango fruit from the tree
picking of nails using a bar magnet
repulsion of two like charges
pushing of a wheel-barrow on a level gound
Correct answer is D
No explanation has been provided for this answer.