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A wire when connected to 220V mains supply has power dissipation P1. Now the wire is cut into two equal pieces which are connected in parallel to the same supply. Power dissipation in this case is P2. Then P2 : P1 is

(a) 1 

(b) 4 

(c) 2 

(d) 3

1 Answer

+1 vote
by (78.5k points)
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Best answer

Correct Option(b) 4 

Explanation:

Using the formula, P=V2/R......(i)

where B is resistance of wire, V is voltage across wire and P is power dissipation in wire

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