Two bars of radius 
and 
are kept in contact as show fig. An electric current I is passed through the bars. Which one of following is correct?
A
Heat produced in bar BC is 4 times the heat produced in bar AB
B
Electric field in both halves is equal
C
Current density across AB is double that of across BC
D
Potential difference across 
is 4 times that of across 
is 4 times that of across
Text Solution
Verified by ExpertsThe correct answer is:
A
Current flowing through the bars is equal. Now, the heat produced is given by
or 
or 
or 
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