Question:
Values of work function (Wo) for a few metals are given below Metal Li Na K Mg Cu Ag Wo/eV 2.42 2.3 2.25 3.7 4.8 4.3
The number of metals which will show photoelectric effect when light of wavelength 400nm falls on it is____
Given: h = 6.6 × 10-34 J s
c = 3 x 108 m s-1
e = 1.6 x 10-19 C
Values of work function (Wo) for a few metals are given below
| Metal | Li | Na | K | Mg | Cu | Ag |
| Wo/eV | 2.42 | 2.3 | 2.25 | 3.7 | 4.8 | 4.3 |
The number of metals which will show photoelectric effect when light of wavelength 400nm falls on it is____
Given: h = 6.6 × 10-34 J s
c = 3 x 108 m s-1
e = 1.6 x 10-19 C
Updated On: Feb 20, 2026
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Correct Answer: 3
Solution and Explanation
The correct Answer is: 3
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