In the circuit shown, the resistance r is a variable resistance. If for \[r=fR,\] the heat generation in r is maximum then the value of f is: [JEE ONLINE 09-04-2016] |
A) 1
B) \[\frac{3}{4}\]
C) \[\frac{1}{4}\]
D) \[\frac{1}{2}\]
Correct Answer: D
Solution :
[d] |
to get maximum heat generation from r. |
\[r={{\operatorname{R}}_{eq}}=R/2\] |
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