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What is magnetic flux?

• The total amount of electrical current in a circuit
• The measure of magnetic field passing through a given area
• The force between two magnetic poles
• The speed at which magnetic fields change

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NGSS.HS-PS2-5

In the light-hand analogy for magnetic flux, what does the size of the shadow represent?

• The magnetic field strength
• The surface area
• The magnetic flux
• The light intensity

What is electromotive force (EMF)?

• The force between two magnets
• The energy gained per unit of charge during energy conversion
• The total magnetic field strength
• The resistance in an electrical circuit

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NGSS.HS-PS2-5

How is a battery in an electric circuit analogous to a water pump?

• Both create magnetic fields
• Both store chemical energy
• Both convert mechanical energy to electrical energy
• Both drive flow through a closed system

In what units is EMF measured?

• Amperes
• Watts
• Ohms
• Volts

What happens to an electron when it passes through an ideal battery?

• It loses energy
• It gains energy
• It maintains constant energy
• It changes direction

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NGSS.HS-PS3-2

What is induction?

• The process of creating magnetic fields
• The process of changing magnetic flux to produce EMF
• The conversion of electrical to mechanical energy
• The storage of energy in batteries

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NGSS.HS-PS2-5

According to Faraday's law, how can EMF be produced in a loop?

• By maintaining constant magnetic flux
• By increasing resistance in the circuit
• By varying the magnetic flux
• By removing all magnetic fields

Tags

NGSS.HS-PS2-5

What are the two ways to vary magnetic flux according to Faraday's law?

• Changing current and voltage
• Changing resistance and inductance
• Changing field strength and loop area
• Changing temperature and pressure

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NGSS.HS-PS2-5

What does Lenz's law describe?

• The direction of induced current and field
• The strength of magnetic fields
• The relationship between voltage and current
• The speed of electromagnetic waves

Tags

NGSS.HS-PS2-5

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