Look at the RC circuit below.

The voltage across the resistor is 2.0V (rms).

The voltage across the capacitor is 2.5V (rms).

Do now: Wednesday, April 19, 2023

Find:

1) The RMS current in the circuit

2) The supply voltage, VS

3) The phase difference between the supply voltage

and the current

RC CircuitsRC CircuitsThe total voltage in the circuit can be The total voltage in the circuit can be found by adding the Vfound by adding the VRR and V and VCC phasors phasors

together together

VR

tω

VCVR

VC

Vs

VS

222CRS VVV

Homework: • Sets 3 (Induction) should be finished• Set 4 (AC circuits) due Week 1, Term 4

Electricity “Exam”• Friday 18th Oct (Week 1, Term 4)

Study Skills Evening•This Thursday, 26 September, 7:30pm in Library

Who has finished Activity 16C?

Today’s Kaupapa:

LO 24) Use phasor diagrams to calculate the voltage and impedance of RC circuits

Board notes: then Activity 16D

Look at the circuits below.

The same resistor and capacitor are used in the RC circuit.

Find:

1) The resistance, R, of the resistor circuit 1

2) The reactance, X, of the capacitor circuit 2

3) The capacitance, C, of the capacitor circuit 2

4) The impedance, Z, of the RC circuit 3

5) The current in the RC circuit 3