* Your assessment is very important for improving the workof artificial intelligence, which forms the content of this project
Download Series and Parallel Circuits
Lumped element model wikipedia , lookup
Immunity-aware programming wikipedia , lookup
Galvanometer wikipedia , lookup
Josephson voltage standard wikipedia , lookup
Power electronics wikipedia , lookup
Negative resistance wikipedia , lookup
Flexible electronics wikipedia , lookup
Index of electronics articles wikipedia , lookup
Valve RF amplifier wikipedia , lookup
Switched-mode power supply wikipedia , lookup
Integrated circuit wikipedia , lookup
Operational amplifier wikipedia , lookup
Schmitt trigger wikipedia , lookup
Regenerative circuit wikipedia , lookup
Power MOSFET wikipedia , lookup
Two-port network wikipedia , lookup
Surge protector wikipedia , lookup
Electrical ballast wikipedia , lookup
Opto-isolator wikipedia , lookup
Rectiverter wikipedia , lookup
Current source wikipedia , lookup
Resistive opto-isolator wikipedia , lookup
Current mirror wikipedia , lookup
RLC circuit wikipedia , lookup
NUE054 Applied Electricity 2 Series and Parallel Circuits Worksheet STUDENT NAME: ............................................. DATE: ............................. RESULT: CY / CN OBJECTIVE: To gain an understanding of the circuit quantities, voltage, current and resistance, and the application of ohm’s law using series and parallel circuits via a computer simulation. TIME ALLOWANCE: This activity should take no more than 60 minutes. ASSESSMENT: Individual completion of this worksheet forms the first part of the assessment for this WebQuest. Please follow all instructions carefully and complete all questions in legible handwriting. Once completed, hand your worksheet to your assessor who will mark it. Assessment grades will be either CY (Competent Yes) or CN (Not yet competent). INSTRUCTIONS: a. If not already loaded, follow the link on the Process & Resources page to the Ohm Zone site, or paste the following URL into your web browser: http://www.article19.com/shockwave/oz.htm Note: You must have Adobe Shockwave loaded on your computer for the simulation to work. If not, follow the link on the WebQuest site to download a free copy. You will require a calculator as well to perform calculations. b. Experiment with the Ohm Zone user interface. Read the introduction on the left-hand side and experiment with each of the menus at the bottom. Move the components around using your mouse on the right-hand side and experiment by building a basic circuit. Press the clear button when you have finished experimenting, which will clear the work area. c. Click on the visualize button and the popups buttons on the bottom menu. Now click on ‘the hand’ symbol on the lower menu and a new sub-menu appears. d. You will now complete all of the activities; however you will only answer questions on a few of them. Follow the instruction sequence below. BE AWARE: Due to the internal resistance of the simulation battery, measured battery voltage values will be slightly lower than expected. Let’s start the prac. 1 Exhibit 1. Building a simple circuit. a. Read the introduction on the left, then connect the voltmeter (V) across the resistor and measure the voltage across the resistor. Now measure the voltage across the battery. Write your results below. V r = _______ V Batt = ______ When we measure voltage, we place the meter __________ the component. b. Referring back to the video you watched previously, what is another name we use for voltage? c. Name the direction the current flows from the battery? _____________ Is this current flow electron or conventional current flow? ____________ d. Now place the ammeter (A) in the circuit and measure the current. Current is measured _____________ with the circuit. Write the measured current here__________ e. Fill out the missing sections in the table below by substituting the resistor values and take the measurements by placing the voltmeter and ammeter in the correct places. Resistance Value Green - 10 Ω Yellow - 20 Ω Blue - 100 Ω Purple – 200 Ω Voltage Current From your observations above, in this circuit the ______remains the same no matter what the value of resistance is and as the _________increases in value, the_________decreases in value. 2 Exhibit 2. Building a series circuit. a. Read the introduction and complete the activity. Exhibit 3. Building a parallel circuit. a. Read the introduction and complete the activity. If you remove either light bulb, what happens to the remaining current? ________________________________________________________________ ___________________________________________________________ Exhibit 4. Building a combination circuit. a. Read the introduction and complete the activity. Why is it that if I remove the light bulb at A, the circuit ceases to work, yet if I remove either B or C the circuit continues working? ________________________________________________________________ ________________________________________________________________________________________________________________________________ Exhibit 5. Ohm’s Law. a. Read the introduction and complete the activity. Exhibit 6. Equivalent resistance in a series circuit. a. Read the introduction and complete the activity. Add a 100 ohm resistor (blue) to the circuit. What is the equivalent series resistance of the circuit now?___________ Exhibit 7. Equivalent resistance in a parallel circuit. a. Read the introduction and complete the activity. Replace R2 with a 100 ohm resistor (blue) in the circuit. What is the equivalent parallel resistance of the circuit now? ___________ If I have two resistors of equal value and I place them in parallel, the equivalent parallel resistance is ______ of the value of one of the original resistors. Exhibit 9. Current in a series circuit. a. Read the introduction and complete the activity. Exhibit 10. Current in a parallel circuit. a. Read the introduction and complete the activity. Exhibit 8. Kirchoff’s Current Law. a. Read the introduction and complete the activity. Replace the 200 ohm resistor with a 100 ohm resistor (blue) in the circuit. Measure I1, I2 and I3 again. Is I3 equal to I1 + I2? ___________ 3 Exhibit 12. Voltage in a series circuit. a. Read the introduction and complete the activity. Exhibit 13. Voltage in a parallel circuit. a. Read the introduction and complete the activity. Exhibit 11. Kirchoff’s Voltage Law. a. Read the introduction and complete the activity. If I changed the battery voltage to 20V and the voltage across R3 was 6.66V, what should the voltage be across R2? ___________ Exhibit 14. Short circuits. a. Read the introduction and complete the activity. Final Assessment. Construct a circuit and calculate and measure circuit quantities. a. Click the clear menu to create a blank slate. b. Build a circuit containing the battery, a 100 ohm resistor (blue) in series with the battery, a lamp in parallel with the battery, then a 10 ohm, 20 ohm and 200 ohm resistor all connected in a series branch, yet in parallel to the lamp as per the diagram below: c. Calculate the equivalent resistance of the circuit, then using ohm’s law, calculate the circuit current. Place your results in the table below. Move your mouse over the battery to discover the equivalent resistance of the circuit and measure the overall circuit current using the ammeter as shown above. Calculated equivalent resistance (show all working) Measured equivalent resistance Calculated circuit current(show all working) Measured circuit current 4 Are there any discrepancies in the above results? If so, why? ________________________________________________________________ ________________________________________________________________ ________________________________________________________________ ________________________________________________________________ d. Measure the current through the lamp and the 200 ohm resistor. Write your results below: I Lamp =_________ I 200ohm=________ Does the addition of these values equal the overall circuit current from your table above? ________ e. Calculate the voltage drop across all of the resistors in the circuit using ohm’s law. Write your results in the table below: Calculated Value Measured Value V 100ohm V200ohm V 20ohm V10ohm e. Measure the voltage across all of the resistors in the circuit. Write your results in the table above: Does the addition of either the calculated or measured values equal the overall battery voltage? ________ If not, why not? ________________________________________________________________ ________________________________________________________________ _____________________________________________________________ 5