The direction of electron flow through a...

🔍 Key Concepts

• Electromagnetism basics – what creates the direction of a magnetic field around a conductor or coil • Relationship between current direction and magnetic field direction (think of right‑hand or left‑hand rules) • What factors (like wire size and coil length) affect strength of a magnetic field versus its direction

💭 Think About

• Ask yourself: which choice(s) talk about things that decide the direction of the magnetic lines of force, and which talk about things that affect only how strong the field is? • Consider how changing the direction of current in a coil changes the polarity (north/south) of an electromagnet. Which option reflects that idea? • Look carefully at answer D: if one of the statements in A or C is about direction and the other is about something different, can they both be correct together?

✅ Before You Answer

• Verify which factors control direction of magnetic lines of force: current direction through the coil, and how the coil is wound (clockwise vs counter‑clockwise). • Check whether wire diameter and coil length primarily change field direction or field strength. • Confirm whether the named hand rule in option B is correctly stated and actually applies to this situation.

The direction of electron flow through a coil and the manner of winding the turns:

Influence the direction of magnetic line of force generated by an electromagnet

Are determined by the left-hand status rule

Are determined by the diameter of the wire and length

Both A and C

🔍 Key Concepts

💭 Think About

✅ Before You Answer