Questions 1 and 3 please....experimental procedures are in photos as well for re

Question

Questions 1 and 3 please....experimental procedures are in photos as well for reference
Electromagnetic Induction 16-2 THE EXPERIMENT emember to begin each measurement with the galvanometer using the progressing to the more sensitive buttons if more sensitivity is needed button ( # 1) In your equipment you will find two coils. Find the one with the larger diameter r and connect the two terminals to a galvanometer. Please review the Caution note above. 2) Examine your coil to determine which way it is wound. Draw your circuit in your notebook being careful to indicae the direction of the windings and which end of the wire is attached to which terminal on the galvanometer 3) Use the right-hand rule and Lenz's Law to determine which direction the needle on the galvanometer will deflect when the north pole of a bar magnet is inserted into the coil. A positive current into the right-hand terminal of the galvanometer causes the needle to deflect to the right. Be sure to include a clear statement of your reasoning in your notebook 4) Check your prediction and record the results. If your prediction is not correct, find and correct the error in your reasoning. 5) Predict and check the results of quickly pulling the magnet out of the coil. 6) Predict and check the results of putting the south pole into the coil and then removing it. 7) How does the speed of inserting and removing the magnet affect the induced current? Explain. 8) Predict what will happen if the magnet is held steady and the coil is moved. Try a few cases to check your ideas. Part B-Coils and Coils ) Connect a 25- resistor in series with the SPST switch and the smaller coil, and connect the combination to the variable outputs on the power supply. The resistor is needed to limit the current through the coil. windings of the coils. for the deflection of the galvanometer needle when you apply power. Be sure to clearly indicate 2) Draw the circuit in your notebook being especially careful to indicate the direction of the 3) Place the smaller coil (the primary) into the larger coil (the secondary) and predict the direction your line of reasoning

Explanation / Answer

1. Iron core lets the magnetic field pass through it such that very less magnetic field leaks out of the coils. Hence, magnitude of magnetic field increases when an iron core is placed in solenoid. Hence magnetic flux also changes accordingly and hence the current induced which depends upon the change in magnetic field through coil also changes.

3. If lens law had opposite sign, then the direction of induced current would have been opposite too.

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