Lesson: Magnetic Force on a Current-Carrying Conducting Loop in a Magnetic Field

In this lesson, we will learn how to calculate the magnitude of the magnetic dipole force that acts on a current-carrying loop in a uniform magnetic field.

Sample Question Videos

01:28

Worksheet: 19 Questions • 1 Video

Q1:

A proton has a magnetic field due to its spin. The field is equivalent to that created by a circular current loop m in radius that carries a current of A. Find the magnitude of the maximum torque on a proton that can be produced by a 2.50-T magnetic field.

Q2:

A dc power line for a light-rail system carries a current of A at an angle of relative to Earth’s T magnetic field. What is the magnitude of the force that acts on a 100-m section of this line?

Q3:

By how many percent is the torque of the motor decreased?

How many percent would the current to the motor need to be increased to compensate for the loss of torque by the motor?

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