Which two concepts are connected by the right-hand rule for electromagnetism?

Which two concepts are connected by the right-hand rule for electromagnetism?

• A. Direction of current and direction of magnetic field
• B. Direction of current and magnitude of charge
• C. Electric potential and magnetic field
• D. Charge quantity and resistance

Answer: (A)

The right-hand rule links how a current produces a magnetic field. By convention, point your right hand with the thumb in the direction of the current, and the curling of the fingers shows the direction of the magnetic field around the wire. This gives a concrete connection: the current's direction sets the orientation of the magnetic field lines encircling the conductor. The rule applies similarly to coils, telling you the field direction inside the coil based on current flow. Magnitude isn’t specified by this rule—the strength depends on the amount of current and the geometry of the setup. The rule is not about charge magnitude, electric potential, or resistance, which are different electrical quantities.

The right-hand rule links how a current produces a magnetic field. By convention, point your right hand with the thumb in the direction of the current, and the curling of the fingers shows the direction of the magnetic field around the wire. This gives a concrete connection: the current's direction sets the orientation of the magnetic field lines encircling the conductor. The rule applies similarly to coils, telling you the field direction inside the coil based on current flow.

Magnitude isn’t specified by this rule—the strength depends on the amount of current and the geometry of the setup. The rule is not about charge magnitude, electric potential, or resistance, which are different electrical quantities.