Magnetism

• 30 coils will hold 50 paperclips
• Using more coils increases the strength of the electromagnet
• 15 coils hold twice as many paperclips as 10 coils
• The more coils, the fewer paperclips the electromagnet will hold

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The distance between geographic north and where a compass needle points is called:

• Magnetic Field

• Magnetic Declination

• Magnetic Inclination

• Magnetic Force

Which direction is the North Pole of this electromagnet?

• Right
• Left
• Up
• Down

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NGSS.HS-PS2-5

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The atoms of a magnetized substance organize into regions in which the magnetic fields of the atoms are aligned.

• spins
• domains
• energy levels
• arrangements

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In un-magnetized materials the domains are __________ aligned.

• super

• slightly
• randomly
• always

What does the first Right Hand Rule tell you?

• Fingers point to current and the thumb points toward thumb
• Fingers are the magnetic field & thumb direction of current
• Fingers are current and thumb is direction of magnetic field
• Thumbs up is the OK sign for magnetic field to work

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NGSS.HS-PS2-5

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Which statement is true about Earth’s magnetic field?

• Magnetic field lines run from geographic north to south.
• Magnetic field lines start and stop at the surface of Earth
• North magnetic pole isn't the same as north geographic pole.
• A compass operates using the electric field of Earth.

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NGSS.HS-PS3-5

An electron is over the equator 100 miles above the surface of the Earth. It is at rest with respect to the magnetic field lines of the Earth. What is true about the force on the electron due to the B-field of Earth?

• The force points to the east.
• The force points toward the west.
• The force points upward from the surface of Earth.
• The force equals 0 N.

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NGSS.HS-PS2-5

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What is the force on the particle?

• 6.20 x 10^-17 N
• 5.25 x 10¹⁰ N
• 2.48 x 10^-18 N
• 5.25 x 10^-18 N

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NGSS.HS-PS2-5

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What is the force on the wire if it is carrying a current of 3.0 A?

• 3.0 N
• 0.33 N
• 300 N
• 0.0 N

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NGSS.HS-PS2-5

NGSS.HS-PS3-5