A current-carrying conductor is lying perpendicular to a magnetic field and experiencing some force. If the conductor rotates by 60 degrees counterclockwise, the force on it will
Correct answer: B. Decrease
- A. Increase
- B. Decrease
- C. Will be same
- D. None of these
Explanation
The force on a current-carrying conductor in a magnetic field is given by:F = BIL sinθWhere:F is the force on the conductorB is the magnetic field strengthI is the current flowing through the conductorL is the length of the conductorθ is the angle between the conductor and the magnetic fieldWhen the conductor is perpendicular to the magnetic field, θ = 90 degrees, and sinθ = 1. So the force is maximum.When the conductor rotates by 60 degrees counterclockwise, θ becomes 30 degrees, and sinθ = 1/2. So the force will decrease.
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About Electromagnetism
Magnetic flux density and magnetic flux describe the strength of a magnetic field and the field passing through a surface. A charged particle moving through a magnetic field experiences a force perpendicular to its velocity and may follow circular or helical motion, depending on the angle between velocity and field.
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