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Worksheets7.2 Photoelectric Effect
Total questions: 16
Worksheet time: 8mins
“When a metal surface is illuminated by a beam of light at a certain frequency, electrons can be emitted from the metal.” The following statement is the definition for
Photoelectric Effect
Photonelectric Effect
Energy of quantum
Planck’s constant
Which of the following are characteristics of photoelectric effect?
The lower the frequency of the photon of light, the higher the kinetic energy of the photoelectrons emitted from the metal surface.
The higher the frequency of the photon of light, the higher the kinetic energy of the photoelectrons emitted from the metal surface.
The kinetic energy of photoelectrons does not depend on the intensity of light.
The minimum frequency of light needed for a metal to emit electrons is known as the threshold frequency.
The minimum frequency of light needed for a metal to emit electrons is known as the critical frequency.
“The minimum frequency required to produce photoelectric effect on a metal.” The following is the definition for
Planck’s Frequency
Critical frequency
Threshold frequency
Work function
What is the relationship between the energy of each proton and the frequency of light?
Linearly increase
Constant
Inversely proportional
Directly proportional
“The minimum energy required for a photoelectron to be emitted from a metal surface.” The following is a definition for
Planck’s Frequency
Work function
Threshold frequency
Thermionic emission
What is the maximum velocity of the photoelectron emitted when a monochromatic light ( wavelength = 600 nm) is shone on a metal which has a work function of 1.80 eV?
[Given c = 3 x 10^-8 m s-1, 1 eV = 1.60 × 10^–19 J, mass of electron, m = 9.11 × 10^–31 kg]
3.09 x 10^5 ms-1
1.76 x 10^-6 ms-1
3.09 x 10^-5 ms-1
1.76 x 10^6 ms-1
Diagram shows setup to obtain Planck's constant. What is Activation voltage?
minimum voltage needed to LED light up
maximum voltage needed to LED light up
maximum voltage allowed to LED light up
minimum voltage needed to LED broke
What is the similarities between thermionic emission and photoelectric effect?
energy source
particle emitted
time taken to happen
happen at surface of the metal
E=W+Kmax
Einstein's Photoelectric equation is in accordance with _______________.
Principle of Conservation of Energy
Principle of Conservation of Momentum
Wave-particle Duality
Quantum Energy
A high intensity light with photon energy of 1.8 eV are shone to a metal with work function of 1.9 eV. Will photoelectric effect occur?
Yes
No
What is the relationship between Work Function and threshold frequency?
directly proportional
inversely proportional
linearly decrease
complicated
What is the relationship between Work Function and threshold wavelength?
directly proportional
inversely proportional
linearly decrease
complicated
A red light and a blue light are shone to a metal and photoelectric effect occurred. Which light produce photoelectron with higher velocity?
red light
blue light
same velocity
A metal has threshold wavelength of 731.25 nm. Calculate work function of the metal.
2.72×10−19 J
4.85×10−19 J
1.45×10−19 J
Which are application of photoelectric effect?
Solar cell
Solar panel
light sensor
thermistor
A photon energy with wavelength 621 nm are shone to a metal with work function of 3.1875x10-19 J. Will photoelectric effect occur?
Yes
No
