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**1. Homework Statement**

There are multiple parts to this question, but I have only got through the first 2 before getting stuck. Please could somebody give me a hand as I am really struggling

(a) Calculate the phasor voltage of the voltage source and the phasor current of the current source in both Cartesian and Polar coordinates. Use peak values when calculating the phasors.

(b) What are the phasor voltage and impedance of the Thevenin equivalent circuit of the power supply? (Use peak values for the voltages and currents in your calculation)

(c) What are the phasor current and impedance of the Norton equivalent circuit of the power supply? (Use peak values for the voltages and currents in your calculation)

(d) At what frequency should the circuit operate for the current flowing through the load and the voltage across it to be in phase?

(e) It is known that for a different load the voltage and current across the load are 240cos(ωot+45°) V and 4cos(ωot+60°) A, respectively. How much power is dissipated in that load?

## Homework Equations

## The Attempt at a Solution

These are my attempts at part a, but I was unsure whether they're correct or not

(a)

Voltage source:

|V| = 10 V; Φ = 75°

V = 2.5882 + j 9.6593 V

Current source:

|I|=0.8 A; Φ = -30°

I=-0.4 + j 0.6928 A

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