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.
1m; 0.25Hz
2m; 0.25Hz
2m; 0.50Hz
4m; 0.50Hz
Correct answer is C
For the 4th harmonic, \(L = 2\lambda\)
\(4m = 2\lambda \implies \lambda = \frac{4m}{2}\)
=\(2m\)
Recall, \(v = f\lambda\)
\(1 = f \times 2 \implies f = \frac{1}{2}\)
= 0.50Hz
41.8°
48.2°
60.8°
90.0°
Correct answer is A
\(\eta = \frac{1}{sin\theta}\)
\(1.5 = \frac{1}{sin\theta}\)
\(sin\theta = \frac{1}{1.5} = 0.667\)
\(\theta = sin^{-1}(0.667) = 41.835°\)
\(\approxeq 41.8°\)
Plane waves through a narrow gap emerge as circular waves. This phenomenon is known as
interference
dispersion
refraction
diffraction
Correct answer is D
Diffraction refers to the various things that occur when a wave encounters an obstacle. This bending of the wave after it passes a small gap is an example of diffraction.
Consider the wave equation: \(y = 10sin(x - 50t)\), What does the number 10 represent?
Acceleration
Speed
Amplitude
Wavelength
Correct answer is C
Comparing the given equation with the wave equation:
\(Asin(kx - \omega t)\), we have that A = 10 which is the amplitude of the wave.
4 nodes
5 nodes
3 antinodes
4 antinodes
Correct answer is A
The 3rd overtone for an open pipe has 5 antinodes and 4 nodes.