A constant voltage is applied between the 2 ends of a
uniform metallic wire.
Some heat is developed in it. The heat developed is doubled
if
(a) both the length and radius of the wire are halved.
(b) both the length and radius of the wire are doubled
(c) the radius of the wire is doubled
(d) the length of the wire is doubled.
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Answer / krpg
The heat developed is doubled if both the length and radius
of the wire are doubled.
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