Two wires of same length and thickness having specific resistances 6   Ω   cm and 3   Ω   cm respectively are connected in parallel. The effective resistivity is ρ   Ωcm . The value of ρ to the nearest integer, is ___ .

Question

Two wires of same length and thickness having specific resistances 6 &#160; &#937; &#160; cm and 3 &#160; &#937; &#160; cm respectively are connected in parallel. The effective resistivity is &#961; &#160; &#937;cm . The value of &#961; to the nearest integer, is ___ .

Aicharya · Accepted Answer

&#8757; in parallel, R n e t = R 1 R 2 R 1 + R 2 &#8658; &#961; l 2 A = &#961; 1 l A &#215; &#961; 2 l A &#961; 1 l A + &#961; 2 l A &#8658; &#961; 2 = 6 &#215; 3 6 + 3 = 2 &#8658; &#961; = 4

Two wires of same length and thickness having specific resistances 6   Ω   cm and 3  …

Solution

Two wires of same length and thickness having specific resistances 6 &#160; &#937; &#160; cm and 3 &#160;…

Solution

Two wires of same length and thickness having specific resistances 6 Ω cm and 3 …