Two wires of equal diameters, of resistivities P1 and P2 and lengths 1 and 2, respectively, are joined in series. The equivalent resistivity of the combination is

Question:

Options :

a)ρ1l1+ρ2l2/l1+l2
b)ρ1l2 +ρ2l1/l1-l2
c)ρ1l2+ρ2l1/l1+l2
d)ρ1l1-ρ2l2/l1-l2

Answer :

a)ρ1l1+ρ2l2/l1+l2

Answer Steps :

Step:-1

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