1 markCapacitors
CAPE Physics Unit 2 · 2014 · Paper 2 · Question 1(a)(ii)
Definitions and units of capacitance.
State the unit in which capacitance is measured.
The mark scheme is shown once you've answered.
Practise this questionOther parts of this question
- 1(a)(i)Define the term 'capacitance'.[1 mark]
- 1(a)(iii)Identify the two SI units that comprise the unit for capacitance stated in (a)(ii).[1 mark]
- 1(b)(i)Calculate the value of the voltage,
V_A, when the switch, S, is in Position 1.[2 marks] - 1(b)(ii)Use your results from (b)(i) to calculate the value of the capacitance,
C_A.[3 marks] - 1(b)(iii)Show that the two capacitors in series in Figure 1 are equivalent to a single capacitor of value
20\text{ }\mu\text{F}.[2 marks] - 1(c)(i)On the grid provided on page 7, plot a graph of
V_Ragainsttfor these results.[3 marks] - 1(c)(ii)Draw the tangent to the curve at the point where
t = 0.[1 mark] - 1(c)(iii)Hence, determine the time constant of the voltage decay.[1 mark]
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