A steady current I flows through a wire of radius r, length L and resi

1.	A steady current I flows through a wire of radius r, length L and resistivity ρ. The current produced heat in the wire. The rate of heat loss in a wire is proportional to its surface area. The steady temperature of the wire is independent of– (A) L (B) r (C) I (D) ρ
Answer» Correct :- (A) L Explanation :- Concept of fuse wire

A steady current I flows through a wire of radius r, length L and resistivity ρ. The current produced heat in the wire. The rate of heat loss in a wire is proportional to its surface area. The steady temperature of the wire is independent of– (A) L (B) r (C) I (D) ρ

Answer»

Correct :- (A) L

Explanation :-

Concept of fuse wire

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A steady current I flows through a wire of radius r, length L and resistivity ρ. The current produced heat in the wire. The rate of heat loss in a wire is proportional to its surface area. The steady temperature of the wire is independent of– (A) L (B) r (C) I (D) ρ

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