`a` of a particle undergoing SHM varies with its displacement, `x` from its equilibrium position?
`x_0` and wavelength λ. What is the minimum distance between a crest and a trough measured in the direction of energy propagation?
Ek of the particle?
`f` At time t=0, a small marker on the string is in the position shown.
What is the position of the marker at `t=1/(4f)?`
always obey an inverse square law.
are made up of electric and magnetic fields of constant amplitude.
always travel at the same speed in a vacuum.
are always polarized.
For the instant when t = 2.0 ms, what is the phase difference between the waves and what is the resultant displacement of the waves?
The sound from X can be heard on Y due to
What is the shape of the wave pulse after reflection?
The frequency of the first harmonic of both pipes is the same. What is `(L')/L?`
gamma-ray, microwave, visible
radio wave, infrared, microwave
ultraviolet, infrared, microwave
visible, gamma-ray, radio wave
always in the same direction.
always in opposite directions.
in the same direction for a quarter of the period.
in the same direction for half the period.
Kinetic energy and potential energy
Velocity and acceleration
Velocity and displacement
Acceleration and displacement
4×1026 W. The radius of the orbit of Mars around the Sun is approximately 2×1011 m. What is the best estimate for the power incident on an area of 1 m2 at the radius of Mars’ orbit?
What is the intensity at the surface of another planet which is a distance `d/4` from the star?
What is a possible value for the wavelength of the waves?
X-rays travel faster in a vacuum than ultraviolet waves.
X-rays have a higher frequency than ultraviolet waves.
X-rays cannot be diffracted unlike ultraviolet waves.
Microwaves lie between X-rays and ultraviolet in the electromagnetic spectrum.
`4/3` . The refractive index for light travelling from medium Y to medium Z is `3/5` is the refractive index for light travelling from medium X to medium Z?
Opposite for half a period
Opposite for a quarter of a period
Which of the distances shown in the diagram corresponds to one fringe width of the interference pattern?
7.5 km s–1, the speed of the other wave is 5.0 km s–1. The waves arrive at the detector 15 s apart. What is the distance from the point source to the detector?
2.4 × 10–4 mm
9.6 × 10–4 mm
2.4 × 10–1 mm
9.6 × 10–1 mm
It is in the opposite direction to its velocity
It is decreasing when the potential energy is increasing
It is proportional to the frequency of the oscillation
It is at a minimum when the velocity is at a maximum
Which of the following is the refractive index of glass?
For the motion to be simple harmonic, the restoring force must be proportional to
the amplitude of the oscillation.
the displacement from the equilibrium position.
the potential energy of the system.
the period of the oscillation.
Which of the following statements are correct for the reflected pulse compared to the forward pulse?
I. It moves more slowly.
II. It has less energy.
III. It is inverted.
I and II only
I and III only
II and III only
I, II and III
The generator vibrates at a frequency of 300 Hz.
What is the speed of the wave on the string?
0.90 km s–1
1.2 km s–1
1.8 km s–1
3.6 km s–1
Which point is at the centre of a compression?
x = 0
x = 1 m
x = 3 m
`v` of an object undergoing simple harmonic motion varies with time t for one complete period of oscillation.
Which of the following sketch graphs best shows how the total energy E of the object varies with t?
5 ×10–8 m?