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This is a Lab and everything is in order ) 3. Current scan (user may select constant position) X 000 EXTECH HOLD pivot interactives TRIAL

This is a Lab and everything is in order

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) 3. Current scan (user may select constant position) X 000 EXTECH HOLD pivot interactives TRIAL Position 2 Change 1 K 4. Investigate both videos carefully, then: 1. Make a list of quantities that can be measured using the equipment shown. 2. Identify the variables 3. Identify the constants 4. Identify the independent variables 5. Identify the dependentvariables @ Hint: Your response will be graded on logic, clarity, accuracy, and completeness. @ 5. 1. Sketch (by hand) your predictions for the 6 vs. R graph. [10 points] 2. Sketch (by hand) your prediction for the 9 vs. I graph. [10 points] Guidance for full credit: 0 Assume that an angle of 0 = 0 degrees corresponds to the red tip of the compass needing point to the right. 0 Express your angles in degrees. 0 For each graph, note what is quantity (quantities) are held constant. Explain your reasoning. 0 Submit clear, fully labeled graph images. @ Hint: Your response will be graded on logic, clarity accuracy, and completeness. @ 6. Collect data to check BOTH of the above predictions. This means you will create TWO graphs to match your prediction graphs. There are many different good ways to do this; the approach is up to you. Several notes on data collection: 0 Current is measured in Amperes (A), distance is measured in centimeters (cm), and angle in degrees. 0 Distance measurements are taken from tape on the wire (where the wire cuts the plane of the wood track) and the center of the compass. 0 Angle measurements in degrees will need to be converted to radians for any trigonometric operation. 0 Select the protractor and line tool in the upper right. Use arrow keys are your key board to make minor adjustment to the position of these tools. 0 For accurate measurements, use the (rotatable) line tool to line up the red tip of the compass need and the protractor markings, as shown below. The angle shown is about 40 degrees. Use the Pivot Interactive graphing feature to identify trends in the data. A few final notes: 0 Remember to click "Go\" to load each video. 0 Collect at least 5 data pointsnot including any free point. 7. Collect your data and graph them here. Name ... Name U... var U... var 2 3 4 5 + Add Another Graph v Graph 1 Title 10 Co Vertical Axis N 6 8 Horizontal Axis Go Back to the Table T8. Briefly describe the experimental procedure that you developed. Hint: Your response will be graded on logic, clarity, accuracy, and completeness.9. In words, what is the general relationship between: (a) the angle of deflection and the distance of the compass to the wire, and (b) angle of deflection and the current in the wire? Hint: Your response will be graded on logic, clarity, accuracy, and completeness.10. Express the relationships you described in the previous question in symbolic form (equations): (Be sure to define any symbols that have not yet been defined in this lab). Hint: Your response will be graded on logic, clarity, accuracy, and completeness.Four Compasses in a Line 000 EXTECH Pivot interactives TRIAL Four in a line Change K@ 1. Do NOT play the video yet! Instead, look carefully at the still image and consider the information below: Four magnetic compasses are placed on a wood rail near a metal wire (the green wire at the middle top, extending roughly out of the page. ) A long metal wire (green) extends vertically upward between the rails. The wire is connected across the positive and negative terminals of a variable-voltage power supply. Initially, the power is off and no current runs through the wire. Consider the wire as one long resistor. Current is measured with the digital multimeter (orange digital device shown). @ 2. Predict what will happen to the compasses when the power is turned on. Justify your answer. Include a neat sketch of the setup showing your predicted compass needle directions. @ Hint: Your response will be graded on logic, clarity, accuracy, and completeness. BIszxzE._ .- l'l I'I oElI () 3. Play the video. What happens to the compasses when the power is turned on? Turned off? Describe your observations. Include a neat sketch of the setup showing your observed compass needle directions. () Hint: Your response will be graded on logic, clarity, accuracy, and completeness.@ 4. Attempt to explain these results using your knowledge of electric current in a wire and circuits. Express your model in words, pictures and diagrams. @ Hint: Your response will be graded on logic, clarity accuracy, and completeness. @ 5. Continue to the next section, but do not play the video. \f@ 1. Do NOT play the video yet! Instead, look carefully at the still image and consider the information below: Four compasses are arranged on a horizontal pad around the wire as shown. Initially, the power is off and no current runs through the wire. @ 2. Assuming the same conditions in the previous section, predict what will happen to the compasses when the power is turned on. Justify your answer. Include a neat sketch of the setup showing your predicted compass needle directions. @ Hint: Your response will be graded on logic, clarity, accuracy, and completeness. @ 3. Play the video. What happens to the compasses when the power is turned on? Turned off? Describe your observations below. Include a neat sketch of the setup showing your observed compass needle directions. @ Hint: Your response will be graded on logic, clarity, accuracy, and completeness. @ 4. Attempt to explain these results using your knowledge of electric current in a wire and circuits. Express your model in words, pictures and diagrams. @ Hint: Your response will be graded on logic, clarity, accuracy, and completeness. v Model Development @ 1. Suppose a single magnetic compass is set on a wood rail near a current carrying wire. For this and subsequent activities, the compass will always be to the right of the wire, somewhere on the wood track.

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