Question:
A magnetic needle kept in a non-uniform magnetic field experiences:
A magnetic needle kept in a non-uniform magnetic field experiences:
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Non-uniform field means non-zero gradient, thus non-zero net force!
Updated On: Jun 6, 2026
- torque but not force
- neither torque nor force
- both force and torque
- force but not torque
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The Correct Option is C
Solution and Explanation
Step 1: Concept
Behavior of a magnetic dipole in a magnetic field.
Step 2: Meaning
Forces and moments on a dipole.
Step 3: Analysis
In a uniform field, a dipole experiences only torque. In a non-uniform field, the field strength differs across the dipole's ends, resulting in a net force, in addition to the torque.
Step 4: Conclusion
Both a net force and torque act on the needle.
Final Answer: (C)
Behavior of a magnetic dipole in a magnetic field.
Step 2: Meaning
Forces and moments on a dipole.
Step 3: Analysis
In a uniform field, a dipole experiences only torque. In a non-uniform field, the field strength differs across the dipole's ends, resulting in a net force, in addition to the torque.
Step 4: Conclusion
Both a net force and torque act on the needle.
Final Answer: (C)
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