"Electromagnetism" Article 7th Gr. Resource Book

Front

The D-cell we use today is a direct result of whose discovery?

Back

Alessandro Volta

Front

What happens to the needle of a compass when electric current flows through a nearby wire?

Back

It rotates

Front

What did Ørsted conclude about the flow of electric current?

Back

It produces a magnetic field

Front

Which of the following metals are mentioned as being separated by electromagnets? Copper and gold, Steel and iron, Aluminum and silver, Lead and zinc

Back

Steel and iron

Front

What did some people think about Ørsted's demonstration?

Back

It was planned

Front

The magnetic property of steel and iron makes these metals the easiest to ______ from the solid waste stream.

Back

Separate

Front

What did Ørsted use to demonstrate the effect of electric current?

Back

A battery and a compass

Front

Millions of tons of steel are diverted from trash to reuse each year by powerful ______ cranes.

Back

Electromagnetic

Front

Ørsted's discovery resulted in hundreds of ______ in the years that followed.

Back

Inventions

Front

What did Ørsted write about after his discovery?

Back

His findings