# Magnetic Forces

### Problems

Problem :

A wire of length 10 cm carries a current of 5 esu/s parallel to a magnetic field of 10 gauss. What is the magnitude of the force on the wire?

Problem :

A wire of length 10 cm carries a current of 3×104 esu/s perpendicular to a magnetic field of 10 gauss. What is the magnitude of the force on the wire?

Problem :

A wire in the shape of a square with sides 5 cm carries a current of 1 amp, or 3×109 esu/sec in a plane parallel to a magnetic field of 100 gauss, as shown below. What is the net force on the wire? What is the net torque?

A uniform magnetic field acting on a loop of wire

Problem :

In CGS units, F = . What does this equation convert to in SI units?

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