Two resistors of 15 Ω and 10 Ω are connected in parallel. What is the combined resistance?

Answer and explanation

Correct answer: D. Ω

  1. Step 1: , so .
  2. Step 2: Ω.
Answer
Ω.
Why not the others: Ω: The series formula was used. Ω: The average was taken. Ω: The product was not divided by the sum.

Practise more Classical Mechanics, Electromagnetism and Modern Physics.

Free questions with an explanation for every one, and full timed Tawjihi (General Secondary) mock tests.