What Is The Current Through The Capacitor Immediately After The Switch S Is Closed

Q is same as immediately before after the switch s 1 has been closed for a long time i c 0 electricity magnetism lecture 11 slide 9 a circuit is wired up as shown below. Nearly constant but non zero.

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Immediately after the switch s 1 is closed.

What is the current through the capacitor immediately after the switch s is closed. Rc circuit an uncharged capacitor is connected to a dc voltage source via a switch. A very long time after the switch is closed the current in the circuit is 1. Answer to the capacitor in the figure shown is initially uncharged.

The capacitor is initially uncharged and switches s1 and s2 are initially open. The initial current is 20 ma from part b. A immediately after the switch.

An rc circuit is connected across a dc voltage source through an open circuit and a switch. As soon as the switch is closed the charge on the capacitor increases but the voltage across it decreases as a function of time. Next a resistor of unknown resistance rr is connected in series to the ammeter and the ammeters reading drops to i1.

We seek the time that it takes for iti 0 to reach 10 ma. The ammeter reads a current i0. A resistor is placed in series with the capacitor.

The switch is initially open. The circuit becomes the simple rc circuit for a charged capacitor discharging through a resistor. For the moment just consider the currents that flow while the switch is closed.

It is changed to position b at t0s. The switch is closed at t 0. When the capacitor is full ic is zero.

If you replace the inductor with a piece of wire you would have an rc circuit and the current flowing after the switch is closed would be er. The current decays as it i 0 exp trc. When the switch is closed the current would be flowing through r1 and r2 but when the switch opens the current from the capacitor flows in the opposite direction as the current from r1 and r2 so the total is ic ir1r2.

Capacitors inhibit voltage changes so that just after the switch is closed the voltage across the capacitor is zero. The switch in the figure has been in position a for a long time. The time constant is rc 600 ohm250 x 10 6 f 150 ms.

At a maximum and decreasing 3. Finally a second resistor also of resistance rr is connected in series as well. At t 0 the switch is closed.