Day 4 of Magnetism

Day 4 of Magnetism

Multiple Choice

In an electric motor, the energy transformation begins as  ----

• electrical and becomes chemical
• mechanical and becomes electrical
• electrical and becomes mechanical
• mechanical and becomes chemical

Open Ended

How are generators and motors different?

Multiple Choice

What type of energy comes OUT of a generator?

• Mechanical
• Electrical
• Thermal
• Potential

Multiple Choice

What energy do you put IN to a generator?

• Mechanical
• Electrical
• Thermal
• Potential

Multiple Choice

Generators are devices that convert _____ energy into _____ energy.

• chemical; mechanical
• mechanical; electrical
• electrical; mechanical
• potential; kinetic

Multiple Choice

What two forces are required for generators and electric motors to work? 

• magnetism and thermal 
• electricity and thermal 
• electricity and magnetism 
• magnetism and radiant 

Multiple Choice

Why transformers work with A.C. current but not D.C.

• A.C current produces changing magnetic field.

• D.C current produces changing magnetic field.

• D.C current is weak

• A.C current is powerful

Multiple Choice

What type of transformer is used to increase the voltage from power stations.

• Step-down transformer

• Step-up transformer

Multiple Choice

This picture is an example of a ________________.

• Motor

• Generator

• Step-up transformer

• Step-down transformer

Multiple Choice

How is the leader of the atuobots

• Optimus Prime

• BumbleBee

• Ratchet

• IronHide