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Physics 16 Online
OpenStudy (anonymous):

Help please

OpenStudy (anonymous):

The diagram shows a solenoid connected to a battery. (the solenoid is an electromagnet). |dw:1397263337074:dw| 1) Indicate the direction of the current in the wire by an arrow. 2) Label the S pole of the electromagnet. 3) Briefly explain why a solenoid carrying a.c (alternating current) can be used to demagnetise a magnet. Thank you!

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