(i) Because the resistors 1 and 2 are linked in series and the potential difference is 6 V, their equivalent resistance is 1 + 2 = 3. Using Ohm’s law, the current in the circuit may be computed.
As a result, the 2 consumes 8 W of electricity.
(ii) The voltage across the resistors remains the same when 12 and 2 resistors are linked in parallel. Knowing that the voltage across two resistors is 4 V, the power used by the resistor may be calculated as follows: