Question

What resistance must be connected to a 15 Ω resistance to provide an effective resistance of

6 Ω?​

Answer 1

Explanation:

$1 \div 6 = 1 \div 5 + 1 \div r$

$1 \div r = 5 - 2 \div 30 = 3 \div 30 = 1 \div 10$

R=10 ohm

Answer 2

Answer:

15/91 ohm in parallel