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If The Threshold Frequency For Tungsten Is 1.3 X 10^15Hz; What Is Its Work Function [H = 6.6 X 10^-34 Js]? - Erudites Academy
Physics JAMB

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 J

Correct Answer: Option A

Explanation

Work function, w = hfo = 6.6 x 10-34 x 1.3 x 1015
= 8.58 x 10-19

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