A bare (unshielded) wire of length 10a (where a is a number) with a circular cro

Question

A bare (unshielded) wire of length 10a (where a is a number) with a circular cross section of radius r is connected to a battery of voltage V (sec the figure). In this configuration, the wire dissipates 12 W of power. the same wire is then bent so that it has a loop of radius a mid-way down the wire, and the wire touches itself where the loop is formed (i.e., there is a short-circuit in the wire between the ends of the loop at position 'x' as in the figure). How much power is dissipated in this new configuration? (Assume that the connections between the wire and the battery have zero resistance.)

Explanation / Answer

The power dissipation is 0 because of short circuit .

short circuit means current doesnt go through the resistance path.if there is no resitance then there is no power dissipation

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