NEET Physics Current Electricity Questions Solved


The equivalent resistance between points A and B of an infinite network of resistances each of 1 Ω connected as shown, is 

(1) Infinite

(2) 2 Ω

(3) 1+52Ω

(4) Zero

(3) By formula R=R1+R2×RR2+R

R=1+1×R1+RR2+R=1+R+R

R2R1=0 or R=1±1+42=1±52

Since R cannot be negative, hence R=1+52Ω 

Difficulty Level:

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