PH-334
Fleming’s left-hand rule
Physics · Secondary 3 · Hard · Fleming’s left-hand rule
In a loudspeaker, a vertical coil is placed in a horizontal magnetic field directed from right to left. During one part of the signal, current flows upwards in the coil and the cone moves towards you. Using Fleming’s left-hand rule, what happens when the current reverses and flows downwards?
- The cone moves away from you, backwards
- The cone still moves towards you
- The cone does not move at all
- The cone first moves sideways then stops
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