Advanced Qualification · A-001 Advanced theory · A-001-002-008
In what direction is the magnetic field oriented about a conductor in relation to the direction of electron flow?
- A In the direction determined by the left-hand rule
- B In all directions
- C In the same direction as the current
- D In the direct opposite to the current
Correct answer: A — In the direction determined by the left-hand rule. From the official ISED question bank, verified word for word.
Why
When electrons move through a wire, they create a magnetic field that wraps around the conductor in a circle. The full explanation — and one for every question — is in Pro.
Practise this section
Advanced theory: time constants, reactance, impedance, resonance, Q, and the mathematics behind tuned circuits.