Determine the resistance of the wire in the iron


A soldering iron uses an electric current in a wire to heat the tip. A transformer with 100 turns on the secondary coil provides 45 at an rms voltage of 25 .

a) What is the resistance of the wire in the iron?

b) How many turns are in the primary coil?

c) What is the current in the primary coil?

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Physics: Determine the resistance of the wire in the iron
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