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.
What happens to the rays in a parallel beam of light?
They diverge as they travel
they intersect
They converge as they travel
They meet at infinity
Correct answer is D
No explanation has been provided for this answer.
Parabolic mirrors
Plane mirrors
Cylindrical mirrors
Spherical mirrors
Correct answer is A
No explanation has been provided for this answer.
In which of the following material media will sound travel fastest?
oil
metal
gas
water
Correct answer is B
No explanation has been provided for this answer.
1:80
1:320
1:1280
1:4
Correct answer is A
NOTE: Firstly, it should be noted that the mass, as well as the weight of a body is independent of its size.
∴ Let the weight of the moon = Mm x gm
weight of the earth = Me x ge
But ge = 80gm
∴ weight of the earth = Me x 80gm
=> weight of the moon / weight of the earth = Mm x gm / Me x 80gm
thus Mm/Me ∝ gm/80gm ∝ 1/80
=> Mm:Me ∝ 1:80
13N
17N
√3N
7√3N
Correct answer is A
Component of 8N along the horizontal = 8 cos 60o = 8 x 0.5
= 4N
Similarity Component of 6N along the horizontal = 6 cos 60o = 3N
∴ Total force towards the right = 10 + 4 + 3
= 17N
Again total force toward the left = 4N
∴ Net horizontal force (towards the right) = 17-4
= 13N