A 1.2-$\mu$F 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? A)8.0 $\times$ 10^-2 $\Omega$ B)0.12 $\Omega$ C)12 k$\Omega$ D)8.3 k$\Omega$ E)3.1 k$\Omega$

Question

Quizplus · Accepted Answer

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

τ = RC

Where τ is the time constant, R is the resistance, and C is the capacitance.

We are given that τ = 10 ms and C = 1.2 µF. Substituting these values, we get:

10 ms = R(1.2 µF)

Solving for R:

R = 10 ms / (1.2 µF)

R = 8.3 kΩ

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

A 12- μ\muμ F Capacitor in a Flash Camera Is Charged by a Charged

A 12- $\mu$ F Capacitor in a Flash Camera Is Charged by a Charged