A series RC circuit contains R = 20 Ω and C = 250 μF. It is connected to v = 100 sin(200t) V. Determine the steady-state current.
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A series RC circuit contains R = 20 Ω and C = 250 μF. It is connected to v = 100 sin(200t) V. Determine the steady-state current.

G1 Physics · Accepted Answer

Xᴄ = 1/(ωC) = 1/[200 × 250×10⁻⁶] = 20 Ω. Thus Z = 20√2 Ω and I₀ = 100/(20√2) = 5/√2 A. In an RC circuit, current leads voltage by 45°.