Sample Problem 283, P645

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Sample Problem 28-3, P645
Find magnitude and direction of currents
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RC circuit Charging a Capacitor
i0
Vce
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Charging a Capacitor
Time constant (t) time needs to charge a
capacitor to 63 of its full charge.
The larger the RC, the longer it takes to charge
a capacitor.
The larger the R value, the smaller the current
is in the circuit. The larger the C value, the
more the charge the capacitor can hold
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Concept Check

• Which configuration has the largest final charge
  on the capacitor?
• Which capacitor charges faster?

Answer 1 same 2 (b)
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Discharging a Capacitor
Applications of capacitors