Which of the following resistor–capacitor combinations would allow a capacitor to…

PHYSICS · Single correct · A Level · Physics · Fields and their consequences · Fields and their consequences

Problem

Which of the following resistor–capacitor combinations would allow a capacitor to reach approximately 63 % of its final charge in the shortest amount of time? (a) R=500 Ω,  C=20 μFR = 500\,\Omega,\; C = 20\,\mu\text{F} (b) R=1 kΩ,  C=10 μFR = 1\,\text{k}\Omega,\; C = 10\,\mu\text{F} (c) R=2 kΩ,  C=1 μFR = 2\,\text{k}\Omega,\; C = 1\,\mu\text{F} (d) R=4 kΩ,  C=0.75 μFR = 4\,\text{k}\Omega,\; C = 0.75\,\mu\text{F}

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