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.
17cm
20cm
25cm
100cm
Correct answer is C
F = \(\frac{uv}{u + v}\)
20 = \(\frac{100 \times v}{100 + v}\)
v = 25cm
\(\frac{V}{r}\) - 1
\(\frac{2V}{r}\) - 1
\(\frac{U}{r}\) - 1
\(\frac{2U}{r}\) - 1
Correct answer is B
F = \(\frac{r}{2}\) and v = mu
F = \(\frac{UV}{U + V}\)
\(\frac{r}{2}\) = \(\frac{U \times mu}{U + mu}\)
\(\frac{r}{2}\) = \(\frac{mu^2}{u(1 + m)}\)
\(\frac{r}{2} = \frac{mu}{1+m}\)
\(\frac{r}{2} = \frac{v}{1+m}\)
\(\frac{2v}{r} = 1+m\)
\(m = \frac{2v}{r} - 1\)
6.0 x 102ms-1
1.2 x 103km
3.0 x 103km
6.0 x 10 5km
Correct answer is D
Time = 1 x 4 x 10-3sec
distance = velocity x time
= 3 x 108 x 4 x 10-3
= 6 x 105m
Which of the following waves can propagate through a vacuum?
High velocity sound waves
Ultrasonic waves
Acoustic waves
Infra-red waves
Correct answer is D
No explanation has been provided for this answer.
Determine the distance between the consecutive antinodes XX if the wavelength is 60cm
15cm
30cm
60cm
120cm
Correct answer is B
Distance XX = \(\frac{1}{2}\)\(\lambda\)
= \(\frac{1}{2}\) x \(\frac{60}{1}\)
= 30cm