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PHYSICS

JAMB 2011 - Question 43

Physics 2011 JAMB Past Questions - Question 43: If the threshold frequency for tungsten is 1.3 x 1015Hz, what is its work function?[H = 6.6 x 10-34 Js]

Choose the correct answers from the options given.

If the threshold frequency for tungsten is 1.3 x 1015Hz, 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

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Correct Answer

Explanation

Work function, w = hfo 6.6 x 10^-34 x 1.3 x 10^15
= 8.58 x 10-19