A 3.0 cm section of a horizontal wire, carrying a 6.7 A current from east to west, is placed in a horizontal north-to-south 0.42 T uniform magnetic field in the lab. In what direction is the magnetic force on the 3.0 cm section?
A) north
B) south
C) up
D) down
E) southwest

Question

Quizplus · Accepted Answer

The direction of the magnetic force can be determined using the right-hand rule. If the right-hand thumb points in the direction of the current and the fingers point in the direction of the magnetic field, the palm points in the direction of the magnetic force. In this case, the magnetic force is upward, perpendicular to both the current direction (east-west) and the magnetic field direction (north-south).

A 30 Cm Section of a Horizontal Wire, Carrying a 6