Physics
Grade-10
Easy
Question
On which two sides of the electric motor couple forces are acting which cause the rectangular coil to rotate between the poles of the magnets?
- AB and BC
- BC and CD
- CD and DA
- AB and CD
Hint:
AB and CD
The correct answer is: AB and CD
Applying Fleming's right hand rule, the magnetic field in the coil AB and CD is at the right angles to the magnetic field of the magnet. Thus, a magnetic couple acts, which rotates the coil.
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