Physics > 2007 > 21
JAMB UTME
118.8 cm2 surface of the copper cathode of a voltameter is to be coated with 10-6m thick copper of density 9 x 103 kgm-3. How long will the process run with 10A constant current? [e.c.e. of copper = 3.3 x 10-7 kg C-1]
A.
10.8 min
B.
20.0 min.
C.
0.54 min.
D.
15.0 min.
Answer: C
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