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.
Which of the following waves is both transverse and mechanical?
Water waves
Radio waves
Sound waves
X-rays
Correct answer is A
No explanation has been provided for this answer.
A radioactive isotope has a decay constant of 10-6s-1.
Calculate its half - life?
5.93 x 106s
6.93 x 105s
6.93 x 109s
5.93 x 107s
Correct answer is B
t1/2 = \(\frac{0.693}{\gamma}\) = \(\frac{0.693}{10^-6}\)
= 6.93 x 105
Which of the following electromagnetic waves has the shortest wavelength?
Visible Light
Ultraviolet rays
Infrared rays
Gamma rays
Correct answer is D
No explanation has been provided for this answer.
40s
10s
20s
5s
Correct answer is B
t = \(\frac{v - u}{a}\) = \(\frac{20 - 0}{2}\)
= 10s
30s
20s
25s
15s
Correct answer is D
The total time of flight is given as
\(T = \frac{2usin\theta}{g}\)
Hence, time to maximum height is half of the total time of flight,
t = \(\frac{u sin\theta}{g}\)
= \(\frac{300 \text {sin} 30}{10}\) = 15s