AP Physics 2 : Solenoids

Study concepts, example questions & explanations for AP Physics 2

varsity tutors app store varsity tutors android store

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 #2 : 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 ,

Learning Tools by Varsity Tutors

Incompatible Browser

Please upgrade or download one of the following browsers to use Instant Tutoring: