Question

Let a 500 Ω resistor a 0.1 H inductor and a 2 μF capacitor be connected...

Let a 500 Ω resistor a 0.1 H inductor and a 2 μF capacitor be connected in parallel across an ac supply vs = 50 cos (4000 t) V, where t is in seconds.

  1. A) Draw a phasor diagram for the currents through each element at t = 0.

  2. B) Calculate the impedance of the circuit.

  3. C) From the phasor diagram, write the expression for the current coming from the

    supply as a function of time?

  4. D) From the expression for the impedance, for what value of the frequency is the

    current a minimum?

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