Q: What is a coil of wire with electric current flowing through it called?


Read this paragraph and choose the correct option from the provided answers:

An electromagnet is a solenoid wrapped around a bar of iron or other ferromagnetic material. A solenoid is a coil of wire with electric current flowing through it. This gives the coil north and south magnetic poles and a magnetic field. The magnetic field of the solenoid magnetizes the iron bar by aligning its magnetic domains. You can see this in the Figure below . You can learn how to make an electromagnet at this URL: http://www. youtube. com/watch?v=emlzh9XXWgQ.

 Choices:

- carrier valve

- tectonic valve

- hydraulic valve

- a solenoid


A:
a solenoid