Physics Questions and Answers
If you want to learn more about the nature and properties of matter and energy or you're simply preparing for a Physics exam, these Physics past questions and answers are ideal for you.
If you want to learn more about the nature and properties of matter and energy or you're simply preparing for a Physics exam, these Physics past questions and answers are ideal for you.
When left in a freezer, a bottle full of water cracks on freezing into ice because of the
increase in the volume of water
contraction of the bottle
expansion of the bottle
decrease in the volume of water
Correct answer is A
No explanation has been provided for this answer.
The refractive index of the medium M in the diagram above is
1/√3
2√3
√3
2/√3
Correct answer is C
From the above diagram ; ? = 90o - 30o = 60o
v = 90 - 60 = 30
∴ refractive index = (sin ?)/(sin v) = (sin 60o / sin 30o) = √3/2/1/2
= √3/2 x 1/2
= √3
u/f - f
u/v + f
v/f + 1
v/f - 1
Correct answer is D
Magnification, M = v/u = v (1/u)
And for the Lens formula 1/u + 1/v = 1/f
=> 1/u = 1/f - 1/v
∴M = V(1/u)
= V(1/f - 1/v) = v/f - v/v = v/f - 1
∴M = v/f - 1
The pitch of a sound note depends on
timbre
frequency
harmonics
quality
Correct answer is B
No explanation has been provided for this answer.
Convex lens
Binoculars
Concave lens
Plane glasses
Correct answer is C
A person with this condition is said to be short-sighted. Hence, to correct it, a concave lens is used for correction.