A 9 V battery (no internal resistance) is connected to three resistors in series. The p.d.s across two of them are 2.5 V and 3.5 V. The p.d. across the third is:

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

A) 3 V

Kirchhoff's second law: sum V = mathcalE Rightarrow V3 = 9 - 2.5 - 3.5 = 3 V. SLO P-09-E-19 · Understanding

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