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JAMB Physics 1997 Question 44

Question 44

Capacitors

Two 50 μF parallel plate capacitors are connected in series. The combined capacitor is then connected across a 100-V battery. The charge on each plate of the capacitor is

  1. A.5.00 × 10−3 C
  2. B.2.50 × 10−3 C
  3. C.1.25 × 10−3 C
  4. D.1.00 × 10−2 C
Show the answer and explanation

Answer: B (2.50 × 10−3 C)

Explanation

Two equal capacitors in series give 50/2 = 25 μF. Q = CV = 25 × 10−6 × 100 = 2.50 × 10−3 C.