Chapter 18, Problem 33P

### College Physics

11th Edition
Raymond A. Serway + 1 other
ISBN: 9781305952300

Chapter
Section

### College Physics

11th Edition
Raymond A. Serway + 1 other
ISBN: 9781305952300
Textbook Problem

# Consider the series RC circuit shown in Figure 18.17 for which R = 75.0 kΩ, C = 25.0 µF, and ε = 12.0 V. Find (a) the time constant of the circuit and (b) the charge on the capacitor one time constant after the switch is closed.

(a)

To determine
The time constant τ of the circuit

Explanation

Given Info: Resistance R is 75.0â€‰kÎ© , Capacitance C is 25.0â€‰Î¼F

Explanation:

Formula to calculate time constant Ï„ is,

Ï„=RC

• Ï„ is the time constant
• R is the Resistance
• C is the capacitance

Substitute, 75.0â€‰kÎ© for R, and 25.0â€‰Î¼F for C, to find Ï„ .

Ï„=(75

(b)

To determine
The charge on the capacitor q(t) after the one time constant.

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