RC Circuits.

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Presentation transcript:

RC Circuits

Capacitor in DC No current flows through a capacitor in DC (I constant)

Charging and discharging a Capacitor 1.-When the direction of the current flow is toward the positive plate of a capacitor, then 2. When the direction of current flow is away from the positive plate of a capacitor, then

Charging a Capacitor (1) What happens when we close switch S?

Charging a Capacitor (2) I becomes almost zero after some time Q becomes after some time Time constant

Charging a Capacitor (3)

Discharging a Capacitor (1) What happens when we close switch S?

Discharging a Capacitor (2) I becomes zero after some time Q becomes zero after some time Time constant

Discharging a Capacitor (3)