Question 1
A photon has energy of 1 × 1018 eV.
An object of mass 0.03 kg has kinetic energy equal to the energy of the photon.
What is the speed of the object?
1 m s−1
3 m s−1
10 m s−1
30 m s−1
|
Question 2
Monochromatic light with a photon energy of 4.1 × 10−19 J is incident on a metal surface.
The maximum speed of the photoelectrons released is 4.2 × 105 m s−1.
What is the work function of the metal?
2.5 × 10−19 J
3.3 × 10−19 J
4.1 × 10−19 J
4.9 × 10−19 J
|
Question 3
A muon and an antimuon annihilate to produce the minimum number of photons.
What is the maximum wavelength of the photons?
5.9 × 10−15 m
1.2 × 10−14 m
5.9 × 10−9 m
1.2 × 10−8 m
|
Question 4
An electron collides with a neutral atom and ionizes it. Which of the following describes the particles present after the collision?
an electron and an excited atom
an excited atom containing an excess electron
two electrons and a positive ion
two electrons and a neutral atom in the ground state
|
Question 5
In a photoelectric experiment, light is incident on the metal surface of a photocell. Increasing the intensity of the illumination at the surface leads to an increase in the
work function
minimum frequency at which electrons are emitted
current through the photocell
speed of the electrons
|
Question 6
Monochromatic radiation from a source of light (source A) is shone on to a metallic surface and electrons are emitted from the surface. When a second source (source B) is used no electrons are emitted from the metallic surface. Which property of the radiation from source A must be greater than that from source B?
amplitude
frequency
intensity
wavelength
|
Question 7
When comparing X-rays with UV radiation, which statement is correct?
X-rays have a lower frequency
X-rays travel faster in a vacuum
X-rays do not show diffraction and interference effects
using the same element, photoelectrons emitted using X-rays have the greater maximum kinetic energy
|
Question 8
Electrons moving in a beam have the same de Broglie wavelength as protons in a separate beam moving at a speed of 2.8 × 104 m s–1.
What is the speed of the electrons?
1.5 × 101 m s−1
2.8 × 104 m s−1
1.2 × 106 m s−1
5.1 × 107 m s−1
|
Question 9
A proton moving with a speed 𝑣 has a de Broglie wavelength λ.
What is the de Broglie wavelength of an alpha particle moving at the same speed 𝑣?
|
Question 10
Light of frequency 2.0 × 1015 Hz is incident on a metal surface. The work function of the metal is 4.6 × 10–19 J.
Which statement is correct?
no photoelectrons are released
photoelectrons are released with a maximum kinetic energy of 3.1 × 10–19 J
photoelectrons are released with a maximum kinetic energy of 8.7 × 10–19 J
photoelectrons are released with a maximum kinetic energy of 18 × 10–19 J
|