Answer :

Power dissipated by the resistor of 2 ohm (P) = i2R (where i is the current through the resistor and R is the resistance of the resistor.)


Therefore: i2 = P/R =(18/2) A = 9A


i= 3A


Resistances B and C are connected in parallel, therefore, the current is equally divided in between them i.e. 1.5A.


OR



The effective resistance across the resistors of 4 ohm connected in parallel is:


Req=


The resistance is equal hence same current will flow through these. Hence the potential difference across the parallel combination and the 2Ω resistor is the same.


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