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Use this link to answer the questions: https://phet.colorado.edu/sims/cheerpj/faraday/latest/faraday.html?simulation=faraday

FARADAY'S LAW OF INDUCTION Assignment Learning Goal: Use the "Faraday's Electromagnetic Lab" on PhET to investigate the factors affecting magnitude and direction of induced emf and current. Discussion: Michael Faraday (1791-1867) a British Chemist and Physicist conducted an experiment on a loop of which is connected to a sensitive voltmeter and a magnet. He moved the magnet toward the loop, and he observed that the reading in the voltmeter value changes from zero to non-zero. In his experiment, he confirmed that a moving magnetic field is necessary for electromagnetic induction to occur. In this activity, you will do the same experiment but this time you will use simulated bar magnet and coil. As you do the experiment try to analyze visually how the different factors affects the magnitude of induced emf and the magnitude and direction of induced current. Faraday's Electromagnet Lab . You can access the simulator here: https://phet.colorado.edu/sims/cheerpj/faraday/latest/faraday.html?simulation=faraday Faraday's Electromagnet Lab is composed of five simulations related to electromagnetism. In this activity you will use the pickup coil simulation, which can be found in the second tab of the simulator. Faraday's Electromagnetic Lab (2.07.01) Options Help Bar Magnet Pickup Coil Electromagnet Transformer GeneratorWhen you open the pickup coil tab you can see a set up shown below: Faraday's Electromagnetic Lab (2.07.01) File Qations Help Bar Magnet | Pickup Coll \\ Electromagnet Transformer Generator PITT Bar Magnet Strength: |75 % COMPASS 50 180 LIGHT BULB Flip Polarity INDICATOR Show Field Show Compass Show Field Meter Pickup Coll- S N Indication Loops LOOP COIL BAR MAGNET Loop Area: 60 %% Magnetic (B) Field 1.80 G Show Elections -1.80 G 0.99 G RestAl 146.50 0 FIELD METER You can see the adjustable elements on the right tab of the simulator. The tab labeled Bar Magnet shows the adjustable magnetic strength and polarity reversal. You can also choose here to visually show the magnetic field and direction and the strength of magnetic field using the field meter. Below this tab is the Pickup coil in which you can manipulate here the elements of the coil. You can choose what type of indicator to use, the indicator identifies the strength of the induced emf present in the coil. You can also adjust the loop area and number of loops in this tab. And lastly, to identify the motion of the induced current check the show electrons box. The electrons are represented as gray spheres inside the coil. PROCEDURES: The simulation activity will be divided in to two parts. First, is the adjustment of the bar magnet elements and the second one is the adjustment of the pickup coil. 2PART 1 1. In this set up you will just manipulate the elements in the bar magnet tab and set the variable or elements in the pickup coil tab in a fixed value shown below. Pickup Coll Indicator Loops: Loop Area:| 50 % 20 100 Show Electrons Reset All 2. After setting the elements in the pickup coil, select the voltmeter first as your indicator. Faraday's Electromagnetic Lab (2.07.01) File Options Help Bar Magnet Pickup Coll \\ Electromagnet Transformer Generator PITT Bar Magnet Strength: |20 % + 50 109 voltage Flip Polarity Show FieldShow Compass Show Field Mater Pickup Coll Indicator- S ? Loops: Loop Area: 50 %% 70 Show Elections RestAl3. Set the bar magnet strength in the bar magnet tab to 20%. By dragging the bar magnet, position it to the left portion of the pickup coil. 4. As it set in the left portion of the coil slowly drag the bar magnet into the coil's loop (north pole of the bar magnet must be facing the pickup coil) as shown in the figure below. 5. Observe what happens to the voltmeter dial, the electron in the loop and the magnetic field inside the loop as you drag the magnet. 6. Record your observations in the table below: Bar magnet approaching the loop Bar magnet leaving the loop Value and movement of the voltmeter dial. Direction of the magnetic field inside the loop Direction of the electron's motion inside the loop. 7. With the same set up, drag the bar magnet through the coil but this time at a faster speed. a. What happens to the value and movement of the voltmeter dial? Is it the same as the previous set up observation? Is the value larger or smaller? b. Is the direction of the magnetic field inside the loop and direction of the electron's motion the same with the previous observation? c. Is the rate of the electron's motion the same with the previous observation?8. With the same set-up, change the bar magnet strength to 75%, drag the bar magnet at the same rate in the previous set-up. With the same question in no. 7, compare it with your previous observations. PART B. 1. The second part of the simulation activity is focused on the manipulations of the elements in the pickup coil (loop area and number of coils). In this set-up, the bar magnet elements are set in fixed values shown below. Bar Magnet- Strength | 75 % 50 100 Flip Polarity Show Field Show Compass Show Field Meter 2. With the same experiment done in Part A. Set the number of loops in the pickup coil tab to 1,2, and 3, respectively. Observe what happens to the movement in the voltmeter dial, the direction of the magnetic field inside the loop, the motion and direction of electron inside the loop/'s. Drag the bar magnet in a rate through the loop. After the experiment answer the questions below. a. As you increase the number of loops, are there changes in the value of current in the voltmeter dial? If yes, does the value increases or decreases? b. Does the direction of the magnetic field inside the loop changes as you increase the loop's number?c. Does the direction and speed of electron's motion inside the loop changes as you increase the number of loops? Explain. d. If you change the voltmeter indicator to a light bulb, which of the following number of loops in will produce the brightest light? Explain. 3. For the final set-up, reset the loop number to I with the magnet strength at 75 %. Do the same experiment performed previously, but this time change the loop area to 20%, 50%, and 100 % respectively. After the experiment answer the questions below. a. As you increase area of the loop, are there changes in the value of current in the voltmeter dial? If yes, does the value increases or decreases? b. Does the direction of the magnetic field inside the loop changes as you increase the loop area? c. Does the direction and speed of electron's motion inside the loop changes as you increase the loop area?Results evaluation: In the activity, the changes in the value in the voltmeter shows the value of induced emf and induced current. The direction of the electrons motion in the coil represents the direction of the induced current. Based on your observation in the activity, fill in the table below and write your conclusion on these factors. FACTORS Does it affect the magnitude of | Does it affect the direction of the induced current /induced emf? induced current? (Yes or No, State your observation) | (Yes or No, State your observation) Magnitude of magnetic field (Varying magnetic strength) Change of magnetic field over time (rate of how fast the magnet is being dragged through the loop) Number of loops Varying loop area