A. 2.5 minutes
B. 5.7 minutes
C. 6.7 minutes
D. 7.5 minutes
E. 9.5 minutes

Correct Answer:

Option C – 6.7 minutes

SEE ALSO  A metal is illuminated with a radiation of energy 6.88eV. If the kinetic energy of the emitted electrons is 1.5OeV; calculate the work function of the metal.

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