Faraday's Law

A uniform magnetic field its intensity is 3x10^-3 T pass an area of coil with 100 turns which makes 60 angle with the coil. What is the area of the coil if the magnetic flux is 0.15 Wb?

• 0 m²

• 0.5 m²

• 0.57 m²

• 1 m²

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NGSS.HS-PS3-5

The diagram shows four loops (A, B, C, D) are placed in uniform magnetic field B. use the values in tis diagram then order the values of magnetic flux ascending. (Hint: circle area A= π r²)

• ɸ_A < ɸ_B < ɸ_C < ɸ_D

• ɸ_D < ɸ_B < ɸ_C < ɸ_A

• ɸ_D < ɸ_C < ɸ_B < ɸ_A

• ɸ_A < ɸ_B < ɸ_D < ɸ_C

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NGSS.HS-PS2-5

NGSS.HS-PS3-5

Name the following law: A changing magnetic field creates an electric current in a coil.

• Ampere's Law

• Faraday's Law

• Lenz's Law

• Coulomb's Law

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NGSS.HS-PS2-5

The voltmeter is at 0 in this image. How would you manipulate the experiment to create electricity (measured in volts)?

• Flip the magnet around so the North pole is facing out

• Move the magnet back and forth

• Take the magnet out

• Add more coils around the paper cylinder

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NGSS.HS-PS2-5

How could the experimenter increase the amount of electricity being induced by this experiment?

• Increase the number of coils

• Decrease the number of coils

• Flip the magnet around

• Nothing, the amount of electricity cannot be increased

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NGSS.HS-PS2-5

NGSS.HS-PS3-5

As the north pole of the magnet is moved into the coil, the magnetic flux is _________.

• increasing

• decreasing

• remains constant

• depends on the speed of the magnet

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NGSS.HS-PS2-5

When do we have self induction?

• When the magnet moves into the coil

• When the coil moves into the magnet

• When a constant current passes through the coil

• When a changing current passes through the coil

What is required to produce an eddy current in a piece of aluminum?

• a power source

• a magnetic field

• a current-carrying wire

• a back-EMF a back-EMF

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NGSS.HS-PS2-5

NGSS.HS-PS3-5

Electromagnetic induction is change in ___________________.

• surface area

• magnetic poles

• magnetic flux

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NGSS.HS-PS2-5

Which of the following statements best describes Faraday's Law of Electromagnetic Induction?

• A change in magnetic field within a closed loop induces an electromotive force (EMF) in the loop.

• A constant magnetic field within a closed loop induces an electromotive force (EMF) in the loop.

• A change in electric field within a closed loop induces a magnetic force in the loop.

• A constant electric field within a closed loop induces a magnetic force in the loop.

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