A circular wire has current density 
, where r is the radial distance, out of the wire radius is 
. The end-to-end potential applied to the wire is 
. How much energy (in joule) is converted to thermal energy in 
?
A
B
C
D
Text Solution
Verified by ExpertsThe correct answer is:
B
Heat produced through dr width in time t
Given 
Total heat flowing through wire
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