Act_17 - Name Section Period 17 Activity Sheet Induction...

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Name ____________________________ Section _____________________ Period 17 Activity Sheet: Induction Motors and Transformers Activity 17.1: How Can Current Be Induced in a Closed Circuit? a) Connect the tan coil of wire to the large galvanometer that measures electric current. Move a magnet near and into the wire coil. Describe what happens. b) Hold the magnet still and move the coil of wire. Describe what happens. c) What happens if neither the magnet nor the wire is moving? Activity 17.2: How Do Generators Work? a) Attach a hand-cranked generator to a small motor and turn the crank. Explain what happens inside the generator when the crank turns to create an electric current. b) List the energy conversions that take place when you crank the generator and make the motor’s shaft turn. c) Connect one hand-cranked generator to a second hand-cranked generator and make the second generator spin. How is this activity similar to a generating plant? How is it similar to a motor? Activity 17.3: Is Induced Current Alternating or Direct Current? a) Move a magnet into and out of the small coil of wire with red and green bulbs attached. How must you move the magnet so that the red bulbs light and then the green bulbs light? b) Is the current that you induce as you move the magnet direct current (DC) or alternating current (AC)? _________ How do you know? c)

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This note was uploaded on 06/11/2011 for the course PHYSICS 103 taught by Professor Staff during the Spring '10 term at Ohio State.

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Act_17 - Name Section Period 17 Activity Sheet Induction...

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