You are given resistance wire of length 50 cm and a battery of negligible resistance. In which of the following cases is largest amount of heat generated?
Text Solution
Verified by ExpertsThe correct answer is:
C
Let R be the resistance of the wire, then
(i) The heat generated is 
.
(ii) Resistance of each part will be R/2. When they are connected in parallel, the resistance will be R/4.
Hence, 
.
(iii) In case of four wires connected in parallel, the resistance will be R/8.
(iv) 
Hence, largest amount of heat will be generated in case of four parts connected in parallel.
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