The Right-Hand Thumb Rule is a mnemonic rule that helps you determine the direction of the magnetic field produced by a current-carrying wire. According to...
The Right-Hand Thumb Rule is a mnemonic rule that helps you determine the direction of the magnetic field produced by a current-carrying wire. According to this rule, if you point your right thumb in the direction of the current flow, and your fingers spread out in the direction of the magnetic field, then your middle finger will point in the direction of the magnetic field.
This rule is useful because it is a simple and effective way to remember which way the magnetic field will point. It is particularly helpful for students who are learning about electromagnetism, as it can help them to visualize the magnetic field around a wire.
Examples:
If you are looking at a wire with a positive charge moving left to right, the magnetic field will point upwards.
If you are looking at a wire with a positive charge moving right to left, the magnetic field will point downwards.
If you are looking at a wire with a negative charge moving right to left, the magnetic field will point towards the ground