alleryThe d.c. motor uses which rule to predict the direction of rotation?
AFleming's left-hand rule
BFleming's right-hand rule
CRight-hand thumb rule
DLenz's law of induction
Answer & Solution
Correct answer: A. Fleming's left-hand rule
1. A motor depends on the force on a current-carrying coil in a field.
2. Direction of that force comes from Fleming's left-hand rule.
3. Right-hand rule applies to generators.
4. So option A is correct.
_Source: Selina Concise Physics Class 10, Ch 10 Electromagnetism (Mistral OCR'd PDF), section on dc motor_
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