The magnetic field inside a solenoid of circular cross section is given by
50. Interpret The problem involves a changing magnetic field that induces an electric field. Both fields exert a force on a proton.
Develop The induced electric field inside a long thin cylindrical solenoid, whose magnetic field is increasing with time as
The induced electric field circulates CCW around the direction of
Evaluate Substituting the values given, we find the net force on the proton to be
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