Physics
JAMB 2011
If the threshold frequency for tungsten is 1.3 x 10
15Hz, what is its work function?
[H = 6.6 x 10
-34 Js]
-
A.
8.58 x 10-19 J
-
B.
8.50 x 10-15 J
-
C.
8.58 x 10-17 J
-
D.
8.85 x 10-18
Correct Answer: Option A
Explanation
Work function, w = hfo 6.6 x 10
-34 x 1.3 x 10
15
= 8.58 x 10
-19
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