An electric heater which is connected to a 220 V supply line has two resistance coils A and B of 24 ohm resistance each. These coils can be used separately (one at a time), in series or in parallel. Calculate the current drawn when :
(a) only one coil A is used.
(b) coils A and B are used in series.
(c) coils A and B are used in parallel.

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