Answers

2016-03-05T20:58:20+05:30
It becomes one fourth of the original.
R1 = ρ ℓ1 / A1 

R2 = ρ ℓ2 / A2 = ρ ½ ℓ1 / (2 A1) = ¼ ρ ℓ1 / A1 = ¼ R1 
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2016-03-05T21:14:42+05:30
It becomes one fourth of the original resistance
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