All AP Physics 2 Resources
Example Questions
Example Question #1 : Solenoids
Suppose a long solenoid has a current increase from zero to
in
. The induced EMF magnitude is
. Find the inductance.
Possible Answers:
Correct answer:
Explanation:
Write the formula for inductance and substitute the givens. The length of the solenoid has no effect in this problem.
Example Question #51 : Magnetism And Electromagnetism
A transformer is plugged into a household outlet that supplies
of current. The transformer steps up the potential to
having a secondary coil with
turns. How many turns does the primary coil have?
Possible Answers:
turns
turns
turns
turns
Correct answer:
turns
Explanation:
The relationship between the number of turns for the primary coil and secondary coil in a transformer ( and
respectively) to the relative potentials is
Solving for ,
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