Question 10 • TX-Physics B
For a straight current-carrying wire, the magnetic field’s strength is proportional to the current and decreases with distance from the wire (B = μ₀I/(2πr)). So a larger current makes the field stronger, while moving farther away makes it weaker. The direction of the current changes the field’s direction, not its strength; the wire’s metal and temperature are not factors in this relationship.
AI-written and checked against the verified answer.