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Question 19M.2.HL.TZ2.4c

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Date May 2019 Marks available [Maximum mark: 1] Reference code 19M.2.HL.TZ2.4c
Level HL Paper 2 Time zone TZ2
Command term Calculate Question number c Adapted from N/A
c.
[Maximum mark: 1]
19M.2.HL.TZ2.4c

Three identical light bulbs, X, Y and Z, each of resistance 4.0 Ω are connected to a cell of emf 12 V. The cell has negligible internal resistance.

(c)

The cell is used to charge a parallel-plate capacitor in a vacuum. The fully charged capacitor is then connected to an ideal voltmeter.

The capacitance of the capacitor is 6.0 μF and the reading of the voltmeter is 12 V.

Calculate the energy stored in the capacitor.

[1]

Markscheme

E = « 1 2 C V 2 = 1 2 × 6 × 10 − 6 × 12 2 = » 4.3 × 10 − 4 « J » ✔

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