A current-carrying loop is placed in a uniform magnetic field. The torque acting on it does not depend upon
Correct answer: D. magnetic field
- A. shape of the loop
- B. area of loop
- C. value of current
- D. magnetic field
Explanation
D is the correct answer The torque (τ) acting on a current-carrying loop in a uniform magnetic field depends on the angle between the magnetic field and the normal to the loop, the current in the loop, the area of the loop, and the number of turns in the loop. It does not depend on the strength of the magnetic field itself. Torque is given by the formula τ=N⋅I⋅A⋅B⋅sin(θ), where N is the number of turns, I is the current, A is the area of the loop, B is the magnetic field strength, and θ is the angle between the magnetic field and the normal to the loop.
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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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