Question

You are given several identical resistors each of value 1 Oci and each capable of carrying a maximum current of 1A. It is required to make a suitable combination of these to resistances to produce a resistance of 5K) which can carry a current of 4A. The minimum number of re-sistors required for this job is

Answer 1

Maximum current flowing through each resistor is one ampere i.e. i=1A
Thus total current flowing through the circuit I=i+i+i+i
∴ I=4i=4A
Thus minimum 8 resistors are required to satisfy the above conditions.