Hal makes an electromagnet with a 9-volt battery, wire, and a steel rod. What is the function of electric current in his electromagnet? (1 point)
Responses
Electric current attracts or repels charged objects.
Electric current attracts or repels charged objects.
Electric current determines the strength of the magnet.
Electric current determines the strength of the magnet.
Electric current creates a magnetic field that charges the rod.
Electric current creates a magnetic field that charges the rod.
Electric current powers the electromagnet.
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Electric current powers the electromagnet. It's like the energizer bunny of magnets, always keeping them going and going!
The correct response is "Electric current creates a magnetic field that charges the rod."
To understand why, we need to look at the fundamental principles behind electromagnets. An electromagnet is a temporary magnet that is created by passing an electric current through a coil of wire. The electric current flowing through the wire generates a magnetic field around the wire.
In the case of Hal's electromagnet, when he connects the wire to the 9-volt battery, a flow of electrons is generated from the battery's negative terminal toward its positive terminal. This flow of electrons is known as electric current. As the electric current passes through the wire, it creates a magnetic field.
The steel rod in the center of the coil of wire is made of a ferromagnetic material, which means it can become magnetized in the presence of a magnetic field. When the electric current passes through the wire, it creates a magnetic field, which then magnetizes the steel rod.
So, the function of the electric current in Hal's electromagnet is to create a magnetic field that charges the steel rod, turning it into a temporary magnet. This allows the electromagnet to attract and hold objects made of magnetic materials, such as iron or steel.