Question 292 of 403

You are given several identical resistances each of value R = 10 Ω and each capable of carrying maximum current of 1 ampere. It is required to make a suitable combination of these resistances to produce a resistance of 5 Ω which can carry a current of 4 amperes. The minimum number of resistances of the type R that will be required for this job [CBSE PMT 1990]

(1) 4

(2) 10

(3) 8

(4) 20