NEET Questions Solved


Two wires of the same dimensions but resistivities ρ1 and ρ2 are connected in series. The equivalent resistivity of the combination is 

(1) ρ1 + ρ2

(2) ρ1+ρ22

(3) ρ1ρ2

(4) 2(ρ1+ρ2)

(2) Req=R1+R2

ρeff.2lA=ρ1lA+ρ2lA

ρeff.=ρ1+ρ22.

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