1. What is the minimum resistance which can be made using five resistors each of 1/5 Ω? (a) 1/5 Ω (b) 1/25 Ω (c) 1/10 Ω (d) 25 Ω

Soln:

Answer is (b) 1/25 Ω

Explanation:

Minimum resistance is obtained when resistors are connected parallel 1  = 5 + 5 + 5 +5 +5= 25 Ω

R

R= ¹ 25Ω