Vocabulary Mini Review Magnetism. A(n) ___________ can be made by coiling a wire around an iron nail and connecting it to current. Electromagnet.

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Presentation transcript:

Vocabulary Mini Review Magnetism

A(n) ___________ can be made by coiling a wire around an iron nail and connecting it to current. Electromagnet

A _________ transformer is used to increase voltage. Step Up

A _________ transformer is used to decrease voltage. Step Down

__________ ________ is the process of creating an electric current by moving a magnet through a loop of wire. Electromagnetic Induction

The _________ ________ is the area surrounding a magnet that exerts a magnetic force. Magnetic Field

_________ ________ is current that travels in only one direction. Direct Current

_________ ________ is current that changes direction. Alternating Current

A ________ is used to increase and decrease voltage. Transformer

A ________ magnet retains its magnetic properties for long periods of time. Permanent

A ________ converts mechanical energy into electrical energy. Generator

An __________ ________ converts electrical energy into mechanical energy. Electric Motor

Household voltage in the U.S. is _____ volts. 120

What type of current is produced from a dry cell battery? Direct Current

What type of current is produced from power lines? Alternating Current

Where is the magnetic field the strongest? At the Poles

What happens when a North pole of one magnet is brought near the North pole of another magnet? They Repel

Changing the _______ of an electromagnet changes both the strength and direction of the current. Current

What do the electrons in a magnet look like? They are Aligned

What 3 metals can be made into magnets? Iron, Cobalt & Nickel

What causes the Earth’s magnetic field? Molten Iron & Nickel in the Core