CAPACITORS

DayaEnergiLengkap lihat halaman 201 (lembar ke-205)

Bentuk tipikal kondktor

Simbol InduktorInti udaraInti besiInduktor variabel

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THE SOURCE-FREE RC CIRCUIT

But from the initial conditions, v(0) = A = V0. Hence,This shows that the voltage response of the RC circuit is an exponential decay of the initial voltage. Since the response is due to the initial energy stored and the physical characteristics of the circuit and not due to some external voltage or current source, it is called the natural response of the circuit.

This implies that at t =

Ketika t

THE SOURCE-FREE RL CIRCUIT

we can find the voltage across the resistor as

Assuming that i(0) = 10 A, calculate i(t) and ix (t) in the circuit in Fig. 7.13METHOD 1 The equivalent resistance is the same as the Thevenin resistance at the inductor terminals. Because of the dependent source, we insert a voltage source with vo = 1 V at the inductor terminals a-b, as in Fig. 7.14(a). (We could also insert a 1-A current source at the terminals.) Applying KVL to the two loops results in

Since i1 = i, we may replace i1 with i and integrate:Karena tahanan 2 dan induktor paralel, maka:

Persoalan praktis:

The switch in the circuit of Fig. 7.16 has been closed for a long time. At t = 0, the switch is opened. Calculate i(t) for t > 0.Ketika t

Ketika t> 0, saklar terbuka dan sumber tegangan diputuskan. Kita sekarang memiliki rangkaian RL pada Gambar 7.17 b. Menggabungkan resistor

For the circuit in Fig. 7.18, find i(t) for t > 0.

Answer: 2e2t A, t > 0.

Ketika t

Ketika t >0

Determine i, io, and vo for all t in the circuit shown in Fig. 7.22.

Assume that the switch was closed for a long time.

t >0

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t = 0 R = ?t = 4 R = ? 0, 0 t 4 dant 40 t 4

Switch S1 in Fig. 7.54 is closed at t = 0, and switch S2 is closed at t = 2 s. Calculate i(t) for all t . Find i(1) and i(3).