# ECT122 W4 ILab 2

By sunshineangel531
Jan 21, 2015
475 Words

ECT 122 Week 4 iLab #2

Parts:

Breadboard

DC Power Supply

Hand Held DMM

Test leads

Wire

220 Ω resistor

560 Ω resistor

1.0kΩ resistor

1. State Kirchhoff’s Current Law.

The algebraic sum of the currents entering a node is equal to zero.

2. What is the equation for the total current in a parallel circuit? It= I1+I2+I3….

3. Determine the total current in the following nodes.

1) It= 2mA+4mA+6mA= 0.012x10^-3=12mA

2) I + I1+I3= I2

I= 2mA+4mA= 1mA

I= 1mA- 6mA

I= -5mA

4. Determine the total current in the following circuit.

It= I1+I2+I3= 10mA+20mA+40mA= 0.07 x 10^-3= 70mA

5. If VS = 10 V in the circuit above, what are the following voltages?

R1= V/I= 10V/10mA= 1000 x 10^3= 1kΩ

R2= V/I= 10V/20mA= 500kΩ

R3= V/I= 10V/40mA= 250kΩ

Vr1= IR= 10mA x 1kΩ= 10V

Vr2= IR= 10mA x 500kΩ= 10,000 x 10^3= 10V Vr3= IR= 10mA x 250kΩ= 10,000 x 10^3= 10V

6. Download the Multisim file “Parallel2” from Doc Sharing, Week 4. Calculate the values below.

IT1=__49.2mA____IR1=__10mA____IR2=__17.9mA___IR3=___21.3mA____

V1=___10V______VR1=__10V_____VR2=___10V______VR3=__10V_______

Ir1= Vs/R1= 10V/1000Ω= 0.01 x 10^-3= 10mA

Ir2= Vs/R2= 10V/560Ω= 0.01785 x 10^-3= 17.9mA

Ir3= Vs/R3= 10V/470Ω= 0.021276 x 10^-3= 21.3mA

It= Ir1+Ir2+Ir3=10mA+17.9mA+ 21.3mA= 0.0492 x 10^-3= 49.2mA

V=IR V1= 10mA(1000Ω)= 10V

V2= 17.9mA(560Ω)= 10V

V3= 21.3mA(470Ω)= 10V

7. Using Multisim, simulate the circuit. Use the appropriate test equipment and measure the following values.

IT1=__0.049A____IR1=__10mA__IR2=_17.85mA__IR3=_21.275mA__

V1=__10V______VR1=_10V______VR2=__10V_____VR3=__10V____

8. Prototype the circuit below on the breadboard. Connect the circuit’s input to the variable +12 V supply. Turn on the DC power supply and use the handheld DMM to set it to +10V. Using the handheld DMM, measure the values below. Remember, to measure current, the handheld DMM must be in series with the resistor. Have the professor verify the circuit before applying power.

IT1=_75.1mA___IR1=_10.4mA_____IR2=__18.4mA_____IR3=__47mA_____

V1=__10V______VR1=___10V_____VR2=____10V____VR3=___10V_____ Ir1= Vs/R1= 10V/1kΩ= 0.01 x 10^-3= 10mA

Ir2= Vs/R2= 10V/560Ω= 0.01785 x 10^-3= 17.9mA

Ir3= Vs/R3= 10V/220Ω= 0.04545 x 10^-3= 45.4mA

It= 10mA+17.9mA+45.4mA= 0.0733 x 10^-3= 73.3mA

9. If using ELVIS, use the ELVIS DMM and verify that the following values match the handheld DMM measurements. If NOT using ELVIS, skip to step 10.

IT1=____________IR1=____________IR2=____________IR3=____________

10. How do the measured values compare to the calculated value? Are there any significant differences (YES/NO)? If yes, why? They were the same. No differences.

Parts:

Breadboard

DC Power Supply

Hand Held DMM

Test leads

Wire

220 Ω resistor

560 Ω resistor

1.0kΩ resistor

1. State Kirchhoff’s Current Law.

The algebraic sum of the currents entering a node is equal to zero.

2. What is the equation for the total current in a parallel circuit? It= I1+I2+I3….

3. Determine the total current in the following nodes.

1) It= 2mA+4mA+6mA= 0.012x10^-3=12mA

2) I + I1+I3= I2

I= 2mA+4mA= 1mA

I= 1mA- 6mA

I= -5mA

4. Determine the total current in the following circuit.

It= I1+I2+I3= 10mA+20mA+40mA= 0.07 x 10^-3= 70mA

5. If VS = 10 V in the circuit above, what are the following voltages?

R1= V/I= 10V/10mA= 1000 x 10^3= 1kΩ

R2= V/I= 10V/20mA= 500kΩ

R3= V/I= 10V/40mA= 250kΩ

Vr1= IR= 10mA x 1kΩ= 10V

Vr2= IR= 10mA x 500kΩ= 10,000 x 10^3= 10V Vr3= IR= 10mA x 250kΩ= 10,000 x 10^3= 10V

6. Download the Multisim file “Parallel2” from Doc Sharing, Week 4. Calculate the values below.

IT1=__49.2mA____IR1=__10mA____IR2=__17.9mA___IR3=___21.3mA____

V1=___10V______VR1=__10V_____VR2=___10V______VR3=__10V_______

Ir1= Vs/R1= 10V/1000Ω= 0.01 x 10^-3= 10mA

Ir2= Vs/R2= 10V/560Ω= 0.01785 x 10^-3= 17.9mA

Ir3= Vs/R3= 10V/470Ω= 0.021276 x 10^-3= 21.3mA

It= Ir1+Ir2+Ir3=10mA+17.9mA+ 21.3mA= 0.0492 x 10^-3= 49.2mA

V=IR V1= 10mA(1000Ω)= 10V

V2= 17.9mA(560Ω)= 10V

V3= 21.3mA(470Ω)= 10V

7. Using Multisim, simulate the circuit. Use the appropriate test equipment and measure the following values.

IT1=__0.049A____IR1=__10mA__IR2=_17.85mA__IR3=_21.275mA__

V1=__10V______VR1=_10V______VR2=__10V_____VR3=__10V____

8. Prototype the circuit below on the breadboard. Connect the circuit’s input to the variable +12 V supply. Turn on the DC power supply and use the handheld DMM to set it to +10V. Using the handheld DMM, measure the values below. Remember, to measure current, the handheld DMM must be in series with the resistor. Have the professor verify the circuit before applying power.

IT1=_75.1mA___IR1=_10.4mA_____IR2=__18.4mA_____IR3=__47mA_____

V1=__10V______VR1=___10V_____VR2=____10V____VR3=___10V_____ Ir1= Vs/R1= 10V/1kΩ= 0.01 x 10^-3= 10mA

Ir2= Vs/R2= 10V/560Ω= 0.01785 x 10^-3= 17.9mA

Ir3= Vs/R3= 10V/220Ω= 0.04545 x 10^-3= 45.4mA

It= 10mA+17.9mA+45.4mA= 0.0733 x 10^-3= 73.3mA

9. If using ELVIS, use the ELVIS DMM and verify that the following values match the handheld DMM measurements. If NOT using ELVIS, skip to step 10.

IT1=____________IR1=____________IR2=____________IR3=____________

10. How do the measured values compare to the calculated value? Are there any significant differences (YES/NO)? If yes, why? They were the same. No differences.