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In an RC circuit the time constant is 5 seconds... - SS2 Physics Electricity and Magnetism Question

In an RC circuit, the time constant is 5 seconds. If the capacitance is 20 microfarads, what is the value of the resistance?

Resistance (R) = τ / C 

= (5 seconds) / (20 microfarads) 

= 250,000 ohms = 250 kilohms

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