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.
i only
iii only
i and ii only
i and iii only
ii and iii only
Correct answer is C
When light passes through gas in the atmosphere some of the light at particular wavelengths is scattered resulting in darker bands.
3.00 x 108ms-1
2.46 x 108ms-1
1.57 x 108ms-1
1.32 x 108ms-1
1.11 x 108ms-1
Correct answer is C
ev = \(\frac{1}{2}\)mv2
v2 = \(\frac{ev}{\frac{1}{2}m}\)
V = \(\sqrt{\frac{ev}{\frac{1}{2m}}} = \sqrt{\frac{1.6 \times 10^{-19} \times 70 \times 10^3}{\frac{1}{2} \times 9.1 \times 10^{-31}}}\)
= \(\sqrt{246.2 \times 10^{14}}\) = 1.57 x 108
Which of the following explains the concave meniscus of water in a clean glass tube? the
adhension between water and glass molecules is greater than the sdhension between water molecules
cohension between water molecules is greater then the adhension between glass and water molecule
molecules of water near the glass move faster than the molecules at the centre of the tube
molecules of water at the water-air boundary are often attracted to the centre of the tube
weight of the water pulls the centre part of the surface down
Correct answer is A
No explanation has been provided for this answer.
3.0mm
3.5mm
503.00mm
503.5mm
506.0mm
Correct answer is C
F \(\alpha\) e
F = ke
K = \(\frac{F}{e} = \frac{5}{0.5} = 10\)
when F = 30, e = \(\frac{F}{K} = \frac{30}{10} = 3\)
L = 500 + 3 = 503.00
1.33
1.25
0.80
0.75
0.60
Correct answer is C
cos\(\theta = \frac{R}{Z}\)
R = \(\frac{V}{I} = \frac{40}{2} = 20\)
Z² = R² + \(^X_L\)² = 20² + 15² = √625 = 25
cos \(\theta = \frac{R}{Z} = \frac{20}{25} = 0.8\)