A potential difference of 30 V is applied across a 10 ohm resistor. What current flows?

Answer and explanation

Correct answer: A. 3 A

  1. Step 1: Ohm's law: I = V / R.
  2. Step 2: 30 / 10 = 3 A.
Answer
3 A.
Why not the others: 300 A: voltage and resistance were multiplied. 0.333 A: resistance was divided by voltage. 20 A: resistance was subtracted from voltage.

Practise more Calculations in science.

Free questions with an explanation for every one, and full timed Iraqi Third Intermediate Ministerial Exams mock tests.

All Calculations in science questionsTake a mock test

More Calculations in science questions