A straight conductor carrying current is placed parallel to a uniform magnetic field. The force on the conductor will be:
zero
Correct Answer: Zero
The force on a current-carrying conductor in a magnetic field is given by:
F = BIL sinθ
- B = magnetic field strength
- I = current
- L = length of conductor
- θ = angle between conductor and field direction
When the conductor is parallel to the field, θ = 0°, so sin 0° = 0.
∴ F = 0 (zero force)
Maximum force occurs when θ = 90° (conductor perpendicular to field): F = BIL.
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