Physics 5470 - Electromagnetic Induction

All of the following would increase the voltage induced by the magnet EXCEPT

• increasing the speed of the motion

• increasing the number of coils of wire

• increasing the resistance in the coils

• increasing the strength of the magnet

The scenario shown induces a voltage of magnitude V. If the magnet has twice the magnetic field but its motion stopped, how would the induced voltage change?

• Voltage would be twice as large in the same direction.

• Voltage would be half as large in the same direction.

• Voltage would be twice as large in the opposite direction.

• No voltage would be induced in the coil.

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

Tags

NGSS.HS-PS2-5

NGSS.HS-PS3-5

As the north pole of the magnet is moved out of the coil to the left, the magnetic flux is _________.

• increasing

• decreasing

• remains constant

• depends on the speed of the magnet

Which of the following would decrease the flux through this wire loop?

• decreasing the area of the coil

• decreasing the magnetic field of the coil

• pulling the coil until it leaves the magnetic field

• all of the above

Magnets and coils are moved with velocities shown. Which will NOT induce a voltage in the coil?

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• 
• 
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The magnetic field enclosed by a 0.5 m² wire loop increases from 0T to 3T in five seconds. Which of the following could be used to calculate the voltage in the coil?

• 
• 
• 
• 

A 0.2m by 0.3m wire is pulled at 5m/s into a magnetic field of strength 6T. Which of the following could be used to calculate the voltage in the loop?

• 
• 
• 
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A wire loop is pulled into a magnetic field that is directed into the page. Which direction is current induced in the coil?

• Clockwise

• Counterclockwise

• No current

A wire loop is pulled through a magnetic field that is directed into the page but is neither entering or exiting the field. Which direction is current induced in the coil?

• Clockwise

• Counterclockwise

• No current