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Example Questions
Example Question #691 : Ap Physics 2
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 #1 : Solenoids
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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