The formula for resistors in parallel is derived using Kirchhoff's first law and the fact that:

  1. the p.d. across each branch is the same
  2. the p.d.s add
  3. the same current flows in each
  4. the resistances add
Answer

A) the p.d. across each branch is the same

I = VR1 + VR2 + ldots SLO P-09-E-21 · Application

Physics MCQ · More Current Electricity MCQs · Practise