Question:medium
A uniform metallic wire of radius $r$ and length $l$ is heated by passing a current through it. The heat produced can be made 8 times if
A uniform metallic wire of radius $r$ and length $l$ is heated by passing a current through it. The heat produced can be made 8 times if
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Resistance varies directly with length and inversely with square of radius.
Updated On: Apr 24, 2026
- $l$ is doubled
- both $l$ and $r$ are halved
- $l$ is doubled and $r$ is halved
- $r$ is doubled
- both $l$ and $r$ are doubled
Show Solution
The Correct Option is C
Solution and Explanation
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