Question

what is resistivity how will the resistance of a conductor change if the length is tripled and the area of cross section halfed​

Answer 1

$\huge\underline{\underline{\bold{\red{A}\green{n}\pink{s}\orange{w}\blue{e}{r}}}}$

The resistance of a conductor is directly proportional to its length. so if length is increased then resistivity increases ande vice versa. so if length is doubled resistance will also get doubled i.e resistance is 4 times that of original resistance.

Answer 2

\huge\underline{\underline{\bold{\red{A}\green{n}\pink{s}\orange{w}\blue{e}{r}}}}

Answer

The resistance of a conductor is directly proportional to its length. so if length is increased then resistivity increases ande vice versa. so if length is doubled resistance will also get doubled i.e resistance is 4 times that of original resistance.