Questions
A heater coil is cut into two equal parts and only one part is now used in the heater. The heat generated will now be
a
doubled
b
four times
c
one-fourth
d
halved
detailed solution
Correct option is A
V2R=H as R decreases by two times H increases by two timesTalk to our academic expert!
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Permissible current through a fuse wire of diameter 1 mm is 1A. What should be the radius of a fuse wire, made of same material, whose permissible current is 8A ?
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