right-hand rule

1. A rule that uses the shape the right hand to established the standard orientation of vector quantities normal to a plane, especially when calculating a vector product or the helicity of particle spin. In the case of the vector product C = A × B, the direction of C is obtained by pointing the right hand with fingers straight in the direction of A, and then bending the fingers in the direction of B; the extended thumb now roughly points in the direction of C. For spin, the fingers of the right hand should curl in the direction of motion, and the thumb shows the direction of the spin vector.

Example Sentences

The direction of the current in a helix (Fig. 232) or the polarity of its core may be determined by another right-hand rule.

From Project Gutenberg

It has been shown to be arranged in circles about the conductor, according to the Right Hand Rule.

From Project Gutenberg

Applying the right-hand rule to the coil, its current will then be counter clockwise.

From Project Gutenberg