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- 1. Multiple Choice
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
- 2. Multiple Choice
What is it called when a flow of electricity changes direction?
Direct Current
Alternating Current
- 3. Multiple ChoiceWhen do we have self induction?When the magnet moves into the coilWhen the coil moves into the magnetWhen a constant current passes through the coilWhen a changing current passes through the coil
- 4. Multiple Choice
Name the following law: A moving magnet creates an opposing magnetic field.
Ampere's Law
Faraday's Law
Lenz's Law
Coulomb's Law
- 5. Multiple ChoiceWhat is magnetic levitation?the use of fields to stretch a train above the railsto use of fields to shrink a train above the railsthe use of magnetic fields to cause a train to rise above the rails
- 6. Multiple Choice
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
- 7. Multiple ChoiceElectromagnetic induction is change in ___________________.surface areamagnetic polesmagnetic flux
- 8. Multiple ChoiceVoltage can be induced in a wire bya. moving the wire near a magnet.b. moving a magnet near the wire.c. changing the current in a nearby wire.d. all of these
- 9. Multiple ChoiceWhat would happen if I move a bar magnet in and out of a coil of copper wire?Electric current would disappearThe magnet would explodeElectric current will flow through the wireIt would produce a gravitational field
- 10. Multiple Choice
changing magnetic fields can set up current loops in nearby metal bodies. they dissipate electrical energy as heat, such currents are called
Henry Currents
Faraday Currents
Eddy currents
Inductance current
- 11. Multiple Choice___ Law says that the Induced current is proportional to the change of magnetic fluxLenz'Faraday'sAmpere's
- 12. Multiple ChoiceIn 1831 who discovered electromagnetic induction?Thomas EdisonNikola TeslaMichael Faraday
- 13. Multiple ChoiceWhat would happen if I move a bar magnet in and out of a coil of copper wire?Electric current would disappearThe magnet would explodeElectric current will flow through the wireIt would produce a gravitational field
- 14. Multiple Choice
Which action will increase the deflection of the galvanometer pointer?
The magnetic pole is reversed
The number of turns of coils is increased
The coil is made from insulated wire
The magnet is slowly pushed into the coil
- 15. Multiple ChoiceThe 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 outMove the magnet back and forthTake the magnet outAdd more coils around the paper cylinder
- 16. Multiple ChoiceHow could the experimenter increase the amount of electricity being induced by this experiment?Increase the number of coilsDecrease the number of coilsFlip the magnet aroundNothing, the amount of electricity cannot be increased
- 17. Multiple Choice
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
- 18. Multiple Choice
Direction of deflection of the galvanometer pointer can be determined by
Lenz's Law
Faraday's Law
Fleming's Left Hand Rule
Fleming's Right Hand Rule
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