Answer :

When two 4 ohm resistors are connected in parallel then the equivalent resistance will be

1/Requivalent = 1/4 + 1/4 = 2/4 = 1/2


Or R = 2 ohms


When two 4 ohm resistors are connected in series then the equivalent resistance will be


Requivalent = 4 ohm + 4 ohm = 8 ohm


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