Problem: What is the time constant (units ms) for the discharge of the capacitor?

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The time constant for an RC circuit:

τ=RC

Equivalent resistance for resistors in parallel:

1Req=1R1+1R2+...+1Rn

or for 2 resistors:

Req=R1R2R1+R2

We are going to replace the two parallel resistors with an equivalent resistor then substitute in the equation for the time constant.

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What is the time constant (units ms) for the discharge of the capacitor?

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