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The force on a current-carrying conductor placed in a magnetic field is found using
Athe right-hand thumb rule
BFleming's right-hand rule
CFleming's left-hand rule
DOhm's law
Answer & Solution
Correct answer: C. Fleming's left-hand rule
1. A current in a magnetic field experiences a force perpendicular to both.
2. **Fleming's left-hand rule** relates the directions of field, current and force (thumb = force, forefinger = field, middle finger = current).
3. This is the principle of the electric motor.
_Source: Karnataka SSLC (KSEEB) Class 10 Science, Ch13 'Magnetic Effects of Electric Current', §13.4_
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