Question

Four identical resistors have 12 ohm each. Find the equivalent resistance Req when : (a) all four of them are connected in series, and (b) when all four are connected in parallel.

Answer 1

(a): When the four resistors are connected in series the equivalent resistor value is Req= 48Ω

(b): when the four resistors are connected in parallel the equivalent resistor value is Req=3Ω

Step-by-step explanation:

R=R1=R2=R3=R4= 12Ω

(a)

Req= R1+R2+R3+R4

Req= 48 Ω

(b)

Req= (1/12 * 4)⁻¹

Req= 3 Ω