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Questions and Answers
What is the purpose of Faraday's law in relation to magnetic fields?
What is the purpose of Faraday's law in relation to magnetic fields?
- To predict how a magnetic field will produce an EMF in a loop of wire (correct)
- To measure the strength of a magnetic field
- To calculate the area of a loop of wire
- To generate an EMF in a loop of wire without changing the magnetic flux
What is the result of changing the magnetic flux through a loop of wire?
What is the result of changing the magnetic flux through a loop of wire?
- The loop of wire is demagnetized
- The loop of wire becomes magnetized
- The magnetic field is cancelled out
- An EMF is generated in the loop, driving a current (correct)
What is Lenz's law in relation to induced current?
What is Lenz's law in relation to induced current?
- The induced current is always stronger than the external field
- The induced current is always weaker than the external field
- The induced current always flows in the same direction as the external field
- The induced current and induced magnetic field oppose the change in flux (correct)
What happens to the external magnetic field when a magnet is pulled away from a loop?
What happens to the external magnetic field when a magnet is pulled away from a loop?
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What is the requirement for producing an EMF in a loop of wire?
What is the requirement for producing an EMF in a loop of wire?
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How many magnetic fields are involved when inducing a current in wire using a magnetic field?
How many magnetic fields are involved when inducing a current in wire using a magnetic field?
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