Physics > 2005 > 48
WASSCE
Light of energy 5.0eV falls on a metal of work function 3.0eV and electrons are emitted, determine the stopping potential.
[electronic charge, e = 1.60 × 10-19C]
[electronic charge, e = 1.60 × 10-19C]
A.
1.7V
B.
2.0V
C.
8.0V
D.
15.0V
Answer: B
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