Direction of Magnetic Field Above Current-Carrying Conductor
This question asks us to find the direction of the magnetic field created by a current flowing in a conductor. The current is specified to flow from East to West, and we need to determine the field direction at a point located directly above the conductor.
Understanding the Right-Hand Rule
To solve this, we use a fundamental principle in electromagnetism known as the Right-Hand Rule. This rule helps us determine the direction of the magnetic field produced by an electric current flowing through a straight conductor.
- Imagine holding the conductor in your right hand.
- Point your thumb in the direction of the electric current flow.
- Your fingers will naturally curl around the conductor, indicating the direction of the magnetic field lines circulating around it.
Applying the Rule to the Scenario
Let's apply this rule to the specific case given:
- Current Direction: The current flows from East to West.
- Observation Point: We are interested in the magnetic field at a point directly *above* the conductor.
- Rule Application:
- Place your right hand so that your thumb points West (the direction of the current).
- Now, observe the direction your fingers are pointing at the location *above* the conductor.
- Your fingers will point towards the North.
Therefore, the magnetic field at a point above the conductor carrying current from East to West is directed towards the North.
Conclusion
Based on the Right-Hand Rule, the direction of the magnetic field at a point above the conductor is toward the North.
