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.
The reason for laminating the soft iron core of a transformer is to?
reduce eddy current.
reduce magnetic flux.
increase the magnetic flux.
reduce its efficiency.
Correct answer is A
Laminated iron core means insulating layers glued compact. Now the cores are laminated to reduce Eddy current.
Which of the following quantities is not an example of force?
Mass
Tension
Weight
Friction
Correct answer is A
Mass is a measure of how much matter is in an object.
The process of energy production in the sun is?
nuclear fission
nuclear fusion
electron collision
radioactive decay
Correct answer is B
The process of energy production in the sun is generally by nuclear fusion of hydrogen nuclei, the reaction of which takes place at a tremendous high temperature.
200\(\Omega\)
50\(\Omega\)
\(\frac{100}{\pi}\)
\(\frac{25}{\pi \Omega}\)
Correct answer is A
Given;
L = 2H
F = \(\frac{50}{\pi}\) H\(_{2}\)
X\(_{L}\) = ?
X\(_{L}\) = 2\(\pi\)fL = 2\(\pi\) x \(\frac{50}{\lambda}\) x 2
= 200\(\Omega\)
An astronomical telescope is said to be in normal adjustment when the?
eye is accommodated
focal length of an object lens is longer than that of eye piece
final image is at the near point of eye
final image is at infinity
Correct answer is D
A normal arrangement is an arrangement where the principal focus of objective coincides with the eyepiece so that the final image is at infinity