Lab 2

A.C. Circuits

Purpose: To provide experience with A.C. circuts, Ohm’s Law. To demonstrate the relationship between frequency, impedance and resistance. To investigate simple filter circuits.

Procedure:

Set up the circuit in Fig. 1

My values: R = 2.97 kΩ, C = 4.4 nF

Data:

I. Capacitive Reactance (RC)

Frequency V_G V_R V_C

(kHz) (V_pp) (V_pp) (V_pp)

1.002 2.0 0.4 2.0

2.001 2.0 0.42 1.8

4.005 2.0 0.8 1.8

7.00 2.0 0.8 1.6

10.01 2.0 0.6 1.5

20.00 2.0 1.6 1.4

40.00 2.0 1.9 1.4

70.0 2.0 0.9 1.4

100.0 2.0 0.9 1.5

Procedure:

Set up the circuit in Fig.2.

My values: C = 4.4 nF, R = 99.8 Ω, L = 26.1 mH

V_G Calculated

2.04

1.84

1.97

1.79

1.62

2.13

2.36

2.44

1.75

II. Resonance

Frequency V_G V_C V_R V_L

1.001 2.0 2.0 0.020 0.08

3.002 2.0 2.0 0.04 0.15

6.01 2.0 2.6 0.04 0.6

8.95 2.0 5.6 0.2 1.2

14.18 2.0 0.8 0.04 12

15.01 2.0 8.8 0.06 10

17.00 2.0 0.9 0.04 6

19.01 2.0 2.4 0.12 4.8

21.00 2.0 2.0 0.04 1.2

25.03 2.0 1.0 0.08 1.0

28.00 2.0 0.8 0.3 2.8

32.01 2.0 0.5 0.12 1.0

35.00 2.0 0.4 0.15 0.8

40.00 2.0 0.4 0.16 0.8

Lab 2: AC Circuits