Question

a) 300 %
b) 200 %
18.
The resistance of a wire of cross-section area 20 cm² is 10 12. The resistance of the same wire when its
area of cross-section becomes 10 cm² is
[ ]
a) 10 S2
b) 20 S2
c) 30 Ω
d) 40 S2
$the resistanceofawireofcrosssectionarea20cmsquareis10ohm.theresitanceofthesamewirewhenitsareaofcrosssectionbecomes 10cmsquare$
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Answer 1

Answer:

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Answer 2

Answer:

The resistance of a 20 cm long wire is 5 Ω . The wire is stretched to form a uniform wire of 40 cm length. The resistance now will be :

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