The ‘right-hand grip rule’ can be used to give the direction of the magnetic field lines produced by a current in a long straight wire
The magnetic field is strongest at its poles. The field around a magnet can be represented by lines with arrows on them. The arrows show the direction of the lines of force.
In mathematics and physics, the right-hand rule is a common mnemonic for understanding orientation conventions for vectors in three dimensions. Most of the various left and right-hand rules arise from the fact that the three axes of 3-dimensional space have two possible orientations.
To represent the field around a magnet we use a diagram which needs to obey some rules (or conventions) so that whoever uses it can interpret it correctly.
The direction of magnetic lines of force can be determined by Maxwell's corkscrew rule or right-hand grip rule.
This rule allows you to predict the direction of the circular magnetic field which is created around a conductor when current flows through the wire.
The direction of the field lines shows how a compass would line up if placed at that point. We can use the right hand grip rule to remember the relationship between current and field around a wire
Right Hand Grip Rule. Grip the wire with the right hand, with the thumb pointing along the direction of the current. The other fingers give the direction of the magnetic field around the wire.
• Magnetism • Earth’s magnetic field • Magnetic fields • Drawing the magnetic fields • Strength of magnetic fields • Magnetic fields around wires • The right-hand grip rule • The solenoid.
The Right Hand Rule. We now seek to understand how magnetic field lines align around current carrying conductors. To understand the direction of magnetic field lines, we need to be familiar with a mnemonic called the right hand rule.