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.
A satellite in circular motion around the earth does not have
a gravitational force acting on it
a uniform velocity
an acceleration
a centripetal force acting on it
Correct answer is B
No explanation has been provided for this answer.
Sound interference is necessary to produce the phenomenon of
beats
doppler effect
acoustic resonance
echo
Correct answer is A
No explanation has been provided for this answer.
Which of the following is not a part of the electro-magnetic spectrum?
x-rays
microwaves
infrared radiation
alpha rays
Correct answer is D
No explanation has been provided for this answer.
Which of the following characteristics of light determines its colour?
velocity
wavelength
amplitude
intensity
Correct answer is B
No explanation has been provided for this answer.
2.5D
5.0D
10.0D
25.0D
Correct answer is C
\(\frac{1}{v} = \frac{1}{u}\)
m = \(\frac{v}{u} = \frac{1}{4} = \frac{v}{50}\)
v = 12.5
But \(\frac{1}{v} + \frac{i}{u} = \frac{1}{f}\)
= \(\frac{1}{50} + \frac{1}{12.5} = f\)
f = 10m
P = \(\frac{100}{10} = 10D\)