Chapter 20 Lesson 3 Making an Electric Current with Magnets

What is the transfer of electricity in a generator?

• Mechanical to Electrical 
• Physical to Potential 
• Electrical to Mechanical
• Yogurt to Light

What element is this?

• Li

• C

• F

• Be

Is the transformer shown a step-up or step-down?

• step-up
• step-down

In large generators in power plants, ___________ rotate inside a coil of wire to produce an electric current.

• Wind
• Water
• Magnets
• Circuits

A magnet is moved in and out of a coil of wire connected to a high-resistance voltmeter. If the number of coils doubles, the induced voltage 

• quadruples
• doubles
• is the same
• halves

_______ is an electric current that flows in only one direction.

• Electric generator

• Direct current

• Alternating current

• Turbine

If the input voltage to the primary coil _______, then the output voltage from the secondary coil increases.

• increases

• decreases

Before electric current enters your home, a(n) _______ transformer _____ the voltage of the current to 120 V.

• step-up, increase

• step-down, decrease

• step-up, decrease

• step-down, increase

Increasing the number of coils in an electromagnet will _________ the strength of the magnet.

• decrease

• increase

• not affect

What device is made of coils of wire with an electrical current passing through it in order to generate a magnetic field?  

• Electromagnet 
• Generator
• Electron Magnet 
• Motor