A uniform wire of length l and radius r has a resistance of 100   Ω . It is recast into a wire of radius r 2 . The resistance of new wire will be-

Question

A uniform wire of length l and radius r has a resistance of 100 &#160; &#937; . It is recast into a wire of radius r 2 . The resistance of new wire will be-

Aicharya · Accepted Answer

R = &#961; l A A l = V R = &#961; V A 2 &#961; &#8594; constant V &#8594; constant R &#8733; 1 A 2 &#160; &#8733; 1 r 2 2 R &#8733; 1 r 4 R 2 = 16 R 1 = 1600&#160; &#937;

A uniform wire of length l and radius r has a resistance of 100   Ω . It is recast into a wire of…

Solution

A uniform wire of length l and radius r has a resistance of 100 &#160; &#937; . It is recast into a wire of…

Solution

A uniform wire of length l and radius r has a resistance of 100 Ω . It is recast into a wire of…