A Soldering Iron Uses An Electric Current

Physical help !!!! The soldering iron uses an electric current in the wire to heat the tip. ? 3

The soldering iron uses an electric current in the wire to heat the tip. A 100-turn transformer on a secondary coil produces 51 W at an effective voltage of 28 V. Suppose the soldering iron is connected to a 120 V socket. What is the resistance of wire against soldering iron? Are there too many twists in the main coil? What is the current in the primary coil?

What is the resistance of wire to iron?

P = V 2 / R. You have P and V.

Are there too many twists in the main coil?

Rotation ratio = Tension ratio = 120: 28

That is x / 100 = 120/28

What is the current in the primary coil?

P = I * V and you have P and V.