Electromagnetic Induction

RECAP Given the different illustration of a magnet, complete the table by giving some characteristics and properties of the magnetic field: a b (Photo Credits: PresentationExpress Conceptual Physics, Pearson (Photo Credits: Presentation Express Conceptual Physics, Person (Photo Credits: Google Amoge) (Photo Credits: Google Image,ACTIVITIES Activity 1 - Induced EMF & Induced Current Using the galvanometer and the description of the movement of the magnet, write and explain your observations based on the galvanometer reading on the space provided: Illustration Description Observation/s The magnet is moved through a coil of wire. (Photo Credits: Google Image) HALLAL The magnet is moved faster through the coil of wire. (Photo Credits: Google Image) Loops of wire were addedThe magnet is pulled out rather than pushed in (Photo Credits: Google Image)RECAP Given the statements about electromagnetic induction, write the word TRUE if the statement is correct and write the word FALSE if the statement is incorrect: 1. The amount of voltage induced depends on how quickly the magnetic field lines are traversed by the wire. 2. Increasing the number of loops of wire that move in a magnetic field increases the induced voltage and the current in the wire. 3. Pushing a magnet into twice as many loops will induce twice as much as voltage. 4. In electromagnetic induction, no battery or voltage source is needed to produce current, only the motion of the magnet in a coil or wire loop. 5. Work is done because the induced current in the loop creates a magnetic field that repels the approaching magnet.ACTIVITIES Activity 1 - Lenz's Law Determine the direction of the current induced in the coil for each situation: Observation/s Direction of the Induced Current S (a) N magnetic pole moving toward coil from above the page SAN (b) N magnetic pole moving toward the coil in the plane of the page O (9) Pulling the coil to the right out of a magnetic field that points out of the pageX X X (d) Shrinking a coil in a magnetic field pointing into the page B (e) Rotating the coil about the vertical diameter by pulling the left side toward the reader and pushing the right side away from the reader in a magnetic field that points from right to left in the plane of the page.POSTTEST Choose the letter of the best answer. Write the chosen letter in your notebook. 1. What is electromagnetic induction? A. The production of an electric current created by a varying magnetic field B. The production of the magnetic field, accomplished by running a current through a coil of wire C. Creating electromagnetic fields by any purposeful means D. Building a magnet 2. If a wire is moved perpendicular to the magnetic field, what is induced across the ends of the wire? A. area B. coil C. magnetic field D. potential difference 3. All matters are said to be neutral wherein the numbers of electron and protons are equal so once charges it do not stay for a long time because of the following factors except; A. faster B. slower C. in opposite direction D. parallel to the magnetic field 4. the amount of induced potential difference can be increased if the wire is moved in the magnetic field A. generating electricity B. energy efficient cookers and burners C. energy-efficient motors D. using a magnet to separate scrap metal parts 5. Which of the following is NOT a way that a magnetic field can be varied to induce a current in a wire? A. Move the coil in and out of the magnetic field B. Rotate the coil inside the magnetic field C. Move the coil once it is already fully inside the magnetic field D. Change the strength of the magnetic field