SKEU 3741 ELECTROTECHNIC LABORATORY. R L and R-C SERIES CIRCUIT

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1 Electrotechnic L (Skeu 3741), FKE UTM Skudi Fkulti: FAKULTI KEJUUTEAAN ELEKTIK Nm Mtpeljrn : MAKMAL KEJ. ELEKTIK Kod Mtpeljrn : SKEU 3741 eview elese Dte Lst Amendment Prosedure No : 4 : Juli 2011 : Jun 2010 : PKUTMFKE(O)08 FAKULTI KEJUUTEAAN ELEKTIK UNIVESITI TEKNOLOGI MALAYSIA KAMPUS SKUDAI JOHO SKEU 3741 ELECTOTECHNIC LABOATOY (Experiment 2) L nd C SEIES CICUIT TANSIENT Prepred y: 1. Dr.Mohd Fdli hmt Approved y : Hed of Deprtment Nme: Assoc. Prof. Dr. Azhr Khiruddin 2. Dr. Md Puzi Adullh 3. Dr. syidh Idris 4. Dr. Ahmd Sfwi Mokhtr 5. Pn. Nurulzir A. Bkr 6. En. Aidil Bohri Signture nd Stmp: Signture nd Stmp: Dte: 1 Dte : 2011 Universiti Teknologi Mlysi All ights eserved

2 Electrotechnic L (Skeu 3741), FKE UTM Skudi I. PELIMINAY EXECISE for L Circuit Importnt Note: You re required to do this exercise BEFOE the l session Given vlue =4 kω, 6 kω, 8 kω, L=400mH nd VS=5V, determine V(t) t t = τ, 2τ, nd 3τ (τ =L/) for severl vlue of. For the circuit in Figure 1.0: ) Derived eqution V(t) = VS(t) (1 e (t/ τ) ) ) Plot the grph of V(t) versus t c) Clculte the theoreticl instntneous current i(t) vlues for t= t = τ, 2τ,3τ nd fill in tle 1.0. L i(t) V Figure 1.0 For the circuit in Figure 2.0: ) Derived eqution V(t) = VS(t) e (t/ τ) ) ) Plot the grph of V(t) versus t c) Clculte the theoreticl instntneous current i(t) vlues for t= t = τ, 2τ,3τ nd fill in tle V L i(t) V Figure 2.0 ecommended eference: Sdiku, Fundmentl of Electric Circuit 4 th edition, Universiti Teknologi Mlysi All ights eserved

3 Electrotechnic L (Skeu 3741), FKE UTM Skudi II. PELIMINAY EXECISE for C Circuit Importnt Note: You re required to do this exercise BEFOE the l session Given vlue C=0.05µF, 0.10µF, 0.15µF, =1kΩ nd VS=5V, determine VC(t) t t = τ, 2τ, nd 3τ (τ =C) for severl vlue of C. For the circuit in Figure 3.0: ) Derived eqution VC(t) = VS(t) (1 e (t/ τ) ) ) Plot the grph of VC(t) versus t C V C (t) Figure 3.0 For the circuit in Figure 4.0: c) Derived eqution VC(t) = VS(t) e (t/ τ) ) d) Plot the grph of VC(t) versus t e) Clculte the theoreticl instntneous current i(t) vlues for t= t = τ, 2τ,3τ. i(t) 5V C V C (t) Figure 4.0 ecommended eference: Sdiku, Fundmentl of Electric Circuit 4 th edition, Universiti Teknologi Mlysi All ights eserved

4 Electrotechnic L (Skeu 3741), FKE UTM Skudi III. EXPEIMENT: L nd C Series Circuit Trnsients 1. Aims: i. To investigte the current time response in L nd voltge time response in C circuit. ii. To identify the reltionship etween time constnt nd the current/voltge in percentge vrition. iii. To oserve the current time response with the vritions of resistnce in L circuit nd voltge with the vrition of cpcitnce in C circuit. 2. Equipments: i. Signl genertor ii. Oscilloscope iii. Decde inductnce (L) iv. Decde resistnce () v. Decde cpcitnce/condenser (C) 3. Procedure: Precution: Ensure tht the erth connections of the oscilloscope proe re t the sme erth point (point in Figure 5.0 nd Figure 6.0). Filure to oserve this will dmge the oscilloscope Universiti Teknologi Mlysi All ights eserved

5 PAT 1 ) Turn ON the oscilloscope nd clirte it. LAB SHEETExperiment 2 Electrotechnic L (Skeu 3741), FKE UTM Skudi ) Set the oscilloscope t full scle current/ voltge wveform of the resistor. The oscilloscope screen is just like grph pper where the verticl xis is for the voltge nd the horizontl xis is for time. The verticl xis scle cn e chnge using the volt / div kno nd the horizontl xis scle cn e chnged using the time / div kno. c) Choose the squre wveform t the signl genertor output terminl. Adjust the signl genertor mplitude so tht the pek to pek voltge on the screen is 5 volt. Set the signl genertor frequency to 1 khz nd sketch the input wveform in the spce provided. d) Connect the circuit s shown in Figure 5.0. Oscilloscope OSC 5 Volt pp 1 khz L 400 mh Figure 5.0: L series circuit e) From the wveform otined in the oscilloscope, find the mximum vlue of V for =4 kω, 6 kω, 8 kω nd record it in Tle 1.0. f) ecord in Tle 1.0, the vlues of voltges cross the resistor t time t = L/, t = 2(L/) nd t = 3(L/) for n exponentilly increse nd n exponentilly decy of current Universiti Teknologi Mlysi All ights eserved

6 Electrotechnic L (Skeu 3741), FKE UTM Skudi g) Using the sme xis, sketch the wveform including initil nd finl vlues otined for the different vlues of resistnce (4 kω, 6 kω nd 8 kω) in the spce provided. PAT 2 ) Follow the sme procedures in PAT 1 from ) to c) to set the voltge wveform of the cpcitor. ) Connect the circuit s shown in Figure 6.0 c) From the wveform otined in the oscilloscope, find the mximum vlue of VC for C=0.05µF, 0.10µF, 0.15µF nd record it in Tle 2.0. Oscilloscope OSC 5 Volt pp 1 khz 100 kω C Figure 6.0: C series circuit d) ecord in Tle 2.0, the vlues of voltges cross the cpcitor C t time t = C, t = 2C nd t = 3C for n exponentilly increse nd n exponentilly decy of voltge. e) Using the sme xis, sketch the wveform including initil nd finl vlues otined for the different vlues of cpcitnce (0.05µF, 0.10µF nd 0.15µF) in the spce provided Universiti Teknologi Mlysi All ights eserved

Introduction to Electronic Circuits. DC Circuit Analysis: Transient Response of RC Circuits

Introduction to Electronic Circuits. DC Circuit Analysis: Transient Response of RC Circuits Introduction to Electronic ircuits D ircuit Anlysis: Trnsient esponse of ircuits Up until this point, we hve een looking t the Stedy Stte response of D circuits. StedyStte implies tht nothing hs chnged