What creates a Magnetic field around a wire?

• Electric charge

• Current

• Magnetic charge

• Vacuum

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What did James Clerk Maxwell discover about Electric and Magnetic fields?

• They cannot change

• They can propagate as waves

• They are static

• They can only exist with a medium

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What is not required for Electromagnetic waves to travel?

• Energy

• A medium

• Electric field

• Magnetic field

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What is the speed of Electromagnetic waves in a vacuum?

• 5 x 10^8 m/s

• 3 x 10^6 m/s

• 3 x 10^8 m/s

• 1 x 10^8 m/s

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What does the visible spectrum consist of?

• Radio waves to Microwaves

• Red to Violet

• Gamma Rays to X-Rays

• Infrared to Ultraviolet

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What is the frequency range for violet light?

• Around 5 x 10^14 Hz

• Around 7.5 x 10^14 Hz

• Around 4 x 10^14 Hz

• Around 1 x 10^15 Hz

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Why are ultraviolet rays considered harmful?

• They are used in communication

• They can damage cells

• They have low energy

• They are visible

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What are X-Rays commonly used for?

• Medical imaging

• Cooking food

• Radio communication

• Visible lighting

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What is the primary danger associated with Gamma Rays?

• They are safe

• They are visible

• They are low energy

• They can cause cellular damage

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What region of the Electromagnetic Spectrum do cellphones use?

• Microwaves

• X-Rays

• Gamma Rays

• Visible light

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