An electric wire of length ?I? and area of cross-section \[a\] has a resistance R ohms. Another wire of the same material having same length and area of cross-section 4a has a resistance of [MP PMT 1993]

An electric wire of length ?I? and area of cross-section \[a\] has a r

1.	An electric wire of length ?I? and area of cross-section \[a\] has a resistance R ohms. Another wire of the same material having same length and area of cross-section 4a has a resistance of [MP PMT 1993]
A.	4R
B.	R/4
C.	\[\gamma \times \]pressure
D.	16R
Answer» C. \[\gamma \times \]pressure

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An electric wire of length ?I? and area of cross-section \[a\] has a resistance R ohms. Another wire of the same material having same length and area of cross-section 4a has a resistance of [MP PMT 1993]

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