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WorksheetsIB-E.2 Part 1 BIS Photoelectric effect
Total questions: 27
Worksheet time: 20mins
A particle of light is called a...
Photoelectron
Photon
Proton
Electron
Which of the following changes could cause the photocurrent to stop?
Plank's constant is determined by:
The work function is determined by:
The threshold frequency is determined by:
1. No electrons are emitted below the threshold frequency.
2. Above the threshold frequency the energy of electrons depends on the frequency of the light.
3. Increasing intensity increases the number of emitted electrons.
Which (if any) of these observations can be explained by a wave theory of light?
Which equation gives the Kinetic energy of the electrons in an electric field?
1/2 mv2 = mgh
mcΔΘ = mgh
qV = 1/2 mv2
hf = qV
The Threshold Frequency is the (a) frequency a photon must have to release an electron from the surface of a metal by the photoelectric effect
The Work Function is the (a) energy a photon must have to release an electron from the surface of a metal by the photoelectric effect
Find the threshold wavelength for the photoelectric effect in tungsten (work function for tungsten is 4.5 eV)
138 nm
414 nm
552 nm
276 nm
What is the energy of a photon of wavelength 400 nm?
2.95 eV
3.00 eV
3.09 eV
3.12 eV
In the formula, EK = hf - Φ, what does 'Φ' represent?
The kinetic energy of the incident photon
The kinetic energy of the emitted electron
The threshold frquency
The work function
In the formula, EK = hf - Φ, what does 'hf' represent?
The photon energy of the incident light
The kinetic energy of the emitted electron
The threshold frquency
The work function
Type your answer
(a)
A particle of light is called a...
Photoelectron
Photon
Proton
Electron
What is the best description of 'threshold frequency'?
The minimum energy needed for electrons to escape a surface.
The maximum kinetic energy that an emitted electron has.
The minimum frequency of a photon that will cause an electron to be emitted.
The frequency that an emitted electron will have.
PLease give your final answer in nm - 2 SF (DO not type the unit, only the value)
(a)
When a nucleus undergoes gamma decay, the atomic number of the element....
remains the same
decreases by one.
increases by one.
increases by two.
The arrows in this diagrams depict...
Emission of light energy
Absorption of light energy
Absorption and Emission of light energy
Neither absorptions and emission of light energy
In a demonstration to show the photoelectric effect, why did the red light have no effect on the zinc.
It's (a) wasn't high enough.
How many electrons can one photon release?
(a)
The diagram shows the four lowest energy levels for an electron in an atom. P, Q, R and S represent, to scale, the relative energy values of these energy levels.
An electron transition from level R to level Q is accompanied by the emission of a photon of visible light.
Which electron transition would be accompanied by the emission of a photon of infrared radiation?
S to R
S to Q
Q to P
R to P
Plank's constant is determined by:
