A 1.2-μF capacitor in a flash camera is charged by a 1.5-V battery. When the camera flashes, this capacitor is discharged through a resistor. The time constant of the circuit is 10 ms. What is the value of the resistance?

Question

Quizplus · Accepted Answer

We can use the formula for the time constant of an RC circuit:

τ = RC

Plugging in the given values, we get:

10 ms = R(1.2 μF)

Solving for R, we get:

R = 10 ms / (1.2 μF) = 8.3 kΩ

Therefore, the value of the resistance is 8.3 kΩ, which is answer choice D.

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