Electricity and Magnetism

Isla is working on a science project to build a more efficient electromagnet for her school's science fair. She wants to know which material would most likely increase the strength of the magnetic field when placed inside the coil of her electromagnet. Which material should she use?

• Plastic

• Copper

• Iron

• Glass

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DOK Level 2: Skill/Concept

Evelyn is working on a science project involving an electromagnet. If she doubles the number of coils around the iron core, what happens to the magnetic field strength of the electromagnet?

• It doubles

• It halves

• It quadruples

• It remains the same

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DOK Level 2: Skill/Concept

Maya is experimenting with a small magnet and a paperclip. She notices changes in the magnetic force as she moves the magnet closer to or farther from the paperclip. How does the distance between the magnet and the paperclip affect the magnetic force between them?

• The force increases as the distance decreases

• The force decreases as the distance increases

• The force is not affected by distance

• Both A and B are correct

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DOK Level 2: Skill/Concept

Imagine Benjamin is building a science project that involves an electromagnet. What would likely happen if Benjamin uses a stronger battery in his electromagnet circuit?

• The magnetic field strength decreases

• The magnetic field strength increases

• The number of coils decreases

• The circuit breaks

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DOK Level 2: Skill/Concept

In a school science project, Mia, Mason, and Avery replace a soft iron core with a wooden core in an electromagnet they are building. What effect will this have on the magnetic field strength?

• Increases significantly

• Decreases significantly

• Remains unchanged

• Becomes intermittent

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DOK Level 2: Skill/Concept

James is working on a science project to build an electromagnet. How would he modify the electromagnet to maximize the magnetic force it exerts on a nearby magnetic object?

• Increase the battery voltage

• Decrease the number of coils

• Use a non-metallic core

• Increase the number of coils

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DOK Level 3: Strategic Thinking

Imagine Emma and Harper are experimenting with magnets in their physics class. What would happen if they changed the orientation of two magnets from South and North to North and North?

• The magnetic field strength increases

• The magnetic field strength decreases

• The magnets will go from attracting each other to repelling each other

• The magnets will go from repelling each other to attracting each other

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DOK Level 3: Strategic Thinking

During a physics class demonstration, Rohan places a compass needle near a wire through which Evelyn is passing an electric current. Why does the compass needle deflect?

• The wire heats up the compass

• The magnetic field around the wire interacts with the magnetic field of the compass

• The wire conducts electricity to the compass

• The compass is attracted to the electrical current

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DOK Level 3: Strategic Thinking

Imagine Aiden is experimenting with an electromagnet in his science project. What would be the effect on the magnetic field strength if Aiden increases the current through the electromagnet?

• The field strength increases

• The field strength decreases

• The field strength remains unchanged

• The field strength becomes intermittent

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DOK Level 3: Strategic Thinking

Evelyn is curious about the properties of materials in her science class. How can she demonstrate that a material is magnetic without using any tools?

• By checking if it conducts electricity

• By observing if it attracts small iron objects like paper clips

• By seeing if it floats in water

• By measuring its weight

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DOK Level 3: Strategic Thinking