If a long straight wire carries a current I, what is the direction of the magnet

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Question: If a long straight wire carries a current I, what is the direction of the magnetic field at a point located directly above the wire?

Options:

Correct Answer: Counterclockwise around the wire

Solution:

Using the right-hand rule, the magnetic field at a point directly above the wire is directed counterclockwise around the wire.

If a long straight wire carries a current I, what is the direction of the magnetic field at a point located directly above the wire?

If a long straight wire carries a current I, what is the direction of the magnetic field at a point located directly above the wire?

Step 1: Identify the direction of the current in the wire. Let's say the current is flowing upwards.
Step 2: Use your right hand to apply the right-hand rule. Point your thumb in the direction of the current (upwards).
Step 3: Curl your fingers around the wire. Your fingers will show the direction of the magnetic field lines.
Step 4: Look at the point directly above the wire. Your fingers will be pointing in a counterclockwise direction around the wire.
Step 5: Conclude that the magnetic field at the point directly above the wire is directed counterclockwise.

Magnetic Field Around a Current-Carrying Wire – The magnetic field generated by a long straight wire carrying an electric current follows the right-hand rule, where the thumb points in the direction of the current and the fingers curl in the direction of the magnetic field lines.