A 12 V battery (no internal resistance) is connected to three resistors in series. The p.d.s across two of them are 5 V and 4 V. The p.d. across the third is:

  1. 6 V
  2. 3 V
  3. 30 V
  4. 1.5 V
Answer

B) 3 V

Kirchhoff's second law: sum V = mathcalE Rightarrow V3 = 12 - 5 - 4 = 3 V. SLO P-09-E-19 · Understanding

Physics MCQ · More Current Electricity MCQs · Practise