Answer:
(a)
We can connect the galvanometer to any one of the sources using a key in the
circuit. If the galvanometer shows definite deflection in a given direction,
the source taken is DC source. If the given source is AC source, the average
deflection shown by the galvanometer will be zero.
(b) We can also connect the electroplating equipment to any one of the
source using a key in the circuit. If electroplating takes place, the source
used is DC source. In case of AC source, since the direction of current changes
in direction periodically and alternatively, there is no definite shifting of
the ions of the electrolyte and hence no electroplating takes place.
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