Written by the Fiveable Content Team • Last updated September 2025
Written by the Fiveable Content Team • Last updated September 2025
Definition
Right Hand Rule 2 is a mnemonic for determining the direction of the magnetic field around a current-carrying conductor. Point your thumb in the direction of the current, and your fingers will curl in the direction of the magnetic field lines.
5 Must Know Facts For Your Next Test
Right Hand Rule 2 applies to straight conductors as well as solenoids.
The magnetic field forms concentric circles around a straight current-carrying wire.
In solenoids, the magnetic field inside is strong and uniform, while outside it is weak and resembles that of a bar magnet.
The rule helps visualize how changing the direction of current affects the direction of the magnetic field.
It is crucial for understanding how electromagnets and inductors work in practical applications.
$$\oint \mathbf{B} \cdot d\mathbf{l} = \mu_0 I_{enc}$$, which states that the integrated magnetic field around a closed loop is proportional to the electric current passing through it.
Magnetic Field (B-field): A vector field surrounding magnets and electric currents, where moving charges experience a force. It is measured in teslas (T).