How can the polarity be reversed

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Reference no: EM131022243

1. State the rule for determining the magnetic polarity of a solenoid.

(a) How can the polarity be reversed?

(b) Why are there no magnetic poles when the current through the coil is zero?

2. Why does the motor action between two magnetic fields result in motion toward the weaker field?

Reference no: EM131022243

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