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| Tutorial ID | Title | Tutorial | Video Tutorial | Revision Notes | Revision Questions | |
|---|---|---|---|---|---|---|
| 19.2 | The Photoelectric Effect |
1. What is the threshold frequency of Aluminium if the work function for this material is 3.74 eV? (1 eV = 1.6 × 10-19 J, h = 6.626 × 10-34 J · s)
Correct Answer: B
2. Calculate the speed of electrons detached from sodium when photons of 400 nm wavelength strike the surface of metal. The work function for sodium is 2.26 eV. (1 eV = 1.6 × 10-19 J, h = 6.626 × 10-34 J · s, me = 9.1 × 10-31 kg, c = 3 × 108 m/s)
Correct Answer: D
3. A beam of 182 nm EM waves is used to produce Photoelectric Effect. The resulting stopping voltage is 1.97 V. Calculate the work function (in eV) of the metal. (1 eV = 1.6 × 10-19 J, h = 6.626 × 10-34 J · s, c = 3 × 108 m/s)
Correct Answer: C
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