Question

Four resistors when connected in series give an equivalent resistance of 75 Ω
Three of the resistors have values of 18 Ω, 6 Ω, and 24 Ω respectively. What is the resistance of the fourth resistor?

Answer 1

Answer:

Resistance of 4 th resistor would be 27 ohms.

Explanation:

When the resistors are arranged in series then the total resistance is R1+R2+R3+R4=75(here)

then,R1=18 ohms, R2=6ohms ,R3=24 ohms and R4 is unknown.

Now, 18+6+24+R4=75 then,R4=27ohms.