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Page 1: Lab report 03

EAST WEST UNIVERSITYDEPARTMENT OF EEE

Course code: EEE 201Course name: Electrical circuit ΙΙ

Lab reportExperiment no: 03

Experiment name: Verification of KVL and KCL in an AC circuit.

Student name: B. M. ADNANId: 2011-1-80-020

Section: 01Group no: 01

Group Ids: 2011-1-80-012 2011-1-80-013 2011-1-80-059

Date of performance: 21-06-11Date of submission: 28-06-11

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OBJECTIVE: The main view of the experiment is to be able to study a series and parallel AC circuit using an AC source as well as verify KVL and KCL.

CIRCUIT DIAGRAM:

Circuit diagram for verifying KVL.

Circuit diagram for verifying KCL.

EXPERIMENTAL DATAFOR VERIFYING KVL

R L C V ω f100Ω 20mH 1microF 10V 6283.2rad/s 1000Hz

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Phase difference for Vr = 0Phase difference for Vc = -80.64Phase difference for VL = 83.52Phase difference for Vs = 5.76

EXPERIMENTAL DATAFOR VERIFYING KCL

R1 R2 R3 V C L f ω100Ω 100Ω 101Ω 10V 1microF 50mH 1000KHz 6283.2rad/s

Phase difference for Irc = 57.6Phase difference for IrL = 57.6 Phase difference for Ir = 8.64Phase difference for Is = 8.94

ANSWERS TO THE LAB-REPORT QUESTIONS:1. We get from the experiment,Vr<0 = 5.4<0VVc<θ = 7<-80.64VVL<θ = 6.24<83.52Vand

Vs<θ = 7.6<5.76V

So, the Sum of Vr<0, Vc<θ and VL<θVr<0 + Vc<θ + VL<θ = 5.4<0 + 7<-80.64 + 6.24<83.52 = 7.38<-5.6V

COMPARING

Vs<θ Vr<0 + Vc<θ + VL<θ7.6<5.76V 7.38<-5.6V

Comment: 1. The values are almost same. So, we can ignore the little differences. 2. So, the KVL is verified.

2. We get from the experiment,Irc<θ = 0.0288<57.6AIrL<θ = -0.028<57.6AIr <θ = 0.04<8.64A

And current across the voltage source, Is<θ = 0.049<8.94ASo, the sum of Irc<θ, IrL<θ and Ir <θ isIrc<θ + IrL<θ + Ir <θ = 0.028<57.6 – 0.028<57.6 + 0.0304<8.64

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= 0.04<8.64A

COMPARING

Is<θ Irc<θ + IrL<θ + Ir <θ0.049<8.94A 0.04<8.64A

Comment: 1.The values are almost same. So, we can ignore the little differences. 2. So, the KCL is verified

DISSCISSION: From this experiment we learnt how to verify KVL and KCL on an AC circuit. We also revised the using of oscilloscope.