10
QuizMultiple Select

Cumulative Exam — Cumulative exam

Question 10 • TX-Physics B

Which factors affect the strength of a magnetic field around a current-carrying wire? Check all that apply.the type of metal of the wirethe amount of the currentthe direction of the currentthe temperature of the wirethe distance from the wire

Answer
A
the type of metal of the wire
B
the amount of the current
C
the direction of the current
D
the temperature of the wire
E
the distance from the wire

Explanation

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.

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