AP Physics C Electricity : Using Faraday's Law

Study concepts, example questions & explanations for AP Physics C Electricity

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Example Questions

Example Question #2 : Electromagnetism

A wire loop of area  is placed in a magnetic field whose magnitude varies with time according to the equation . The loop is held in place, perpendicular to the field. If the wire has resistance , what is the magnitude of the maximum instantaneous current induced in the loop?

Possible Answers:

Correct answer:


Relevant equations:

Write the expression for the flux using the given expression for the magnetic field strength:

Take the derivative of this flux to find the induced emf:

Determine the maximum value of , and replace  with this value, to find the maximum induced emf:

Plug this maximum induced emf into , to find the maximum induced current:

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