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Which rule gives the direction of force on a current-carrying conductor in a magnetic field?
ARight-hand thumb rule
BFleming's right-hand rule
CFleming's left-hand rule
DMaxwell's corkscrew rule
Answer & Solution
Correct answer: C. Fleming's left-hand rule
1. Fleming's left-hand rule applies to motors, where current and field produce a force.
2. The forefinger points along the magnetic field, the middle finger along the current.
3. The thumb gives the direction of the force on the conductor.
4. So Fleming's left-hand rule gives the force direction.
5. The right-hand thumb rule gives the field direction around a wire, not the force.
_Source: NCERT Class 10 Science Ch 13 'Magnetic Effects of Electric Current' (learncbse.in extract)_
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