Unit 3 Gizmo Electromagnetic Induction

Go to this link to access the Gizmo virtual lab: https://apps.explorelearning.com/gizmos/launch-gizmo/1044

A wind generator, such as the one shown, uses the power of wind to generate electricity. What do you think is happening inside the wind generator to convert the energy of the spinning blades into electricity?

• The spinning blades turn a turbine connected to a generator.

• The spinning blades directly produce electricity.

• The spinning blades store energy in batteries.

• The spinning blades heat up water to produce steam.

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NGSS.HS-PS3-3

Which of the following methods can create a current in the wire loop and light the light bulb in the Electromagnetic Induction Gizmo?

• Moving a magnet through the loop

• Keeping the magnet stationary

• Using a battery

• Connecting the loop to a power source

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NGSS.HS-PS2-5

NGSS.HS-PS3-5

Observe: While the magnet is not moving, is there any electric field?

• Yes

• No

Sketch: Click Forward, and observe the electric field display. Sketch the electric field at right. Notice the electric field consists of an array of arrows, or vectors. Each vector represents the force on a positive charge located at the base of the vector. What do you notice?

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NGSS.HS-PS2-4

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Experiment: Click Reverse and observe the electric field as the magnet moves away. How does changing the direction of the magnet affect the electric field?

• It reverses the direction of the electric field.

• It increases the strength of the electric field.

• It decreases the strength of the electric field.

• It has no effect on the electric field.

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NGSS.HS-PS2-5

Increasing the speed of the magnet affects the strength of the electric field. How does it affect?

• It increases the strength of the electric field.

• It decreases the strength of the electric field.

• It has no effect on the strength of the electric field.

• It reverses the direction of the electric field.

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NGSS.HS-PS2-5

Make a rule: If you have studied how currents induce magnetic fields, you may recall the right-hand rule. To describe the electric field induced by a moving magnet, you can use a “left-hand rule.” What do the thumb and fingers of your left hand represent in this case?

• Thumb: Direction of magnetic field, Fingers: Direction of induced current

• Thumb: Direction of motion of magnet, Fingers: Direction of electric field

• Thumb: Direction of electric field, Fingers: Direction of motion of magnet

• Thumb: Direction of induced current, Fingers: Direction of magnetic field

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Observe: Drag the wire loop directly above the magnet. Click Forward and observe the wire loop and light bulb. As the magnet is moving, click the camera icon to take a snapshot. Right-click the image, and click Copy Image. Paste this image into a blank document. What do you notice in the wire?

• The wire loop lights up.

• The wire loop remains unchanged.

• The wire loop changes color.

• The wire loop disappears.

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NGSS.HS-PS2-5

How does the direction of the current in the loop compare to the electric field?

• The current is in the same direction as the electric field.

• The current is in the opposite direction to the electric field.

• The current is perpendicular to the electric field.

• The current direction is independent of the electric field.

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NGSS.HS-PS3-5