Electromagnet Quiz - National Science Day (Physics)

There are _____ poles in a magnet.

Answer explanation

There are 2 poles- North and South

Can the Poles of an Electromagnet be controlled?

• No

• Yes

• I don't know

Who found the relation between Electricity and Magnetism?

• Albert Einstein

• William Sturgeon

• Magnes

• William Greener

• Hans Christian Øersted

Answer explanation

Hans Christian Øersted was a Danish physicist and chemist who discovered that electric currents create magnetic fields, which was the first connection found between electricity and magnetism. It was first created in the 19th Century. Oersted's law and the oersted unit are named after him.

When the current is stopped from flowing in the electromagnet ______.

• It loses it's magnetism instantly

• It loses it's magnetism after some time

• It becomes permanently magnetized

• It loses its magnetism after a long time

• None of these

What will increase the strength of the electromagnetic field?

(More than one answers)

• Increasing the Current

• Switching off current

• Increasing number of coils of wire around the magnetic substance

• None of these

Is force of attraction more than repulsion?

• True

• False

• I don't know

Draw a labeled Electromagnet Circuit

Answer explanation

SC Maglev train does not use electromagnets but it uses only standard magnet?

• True

• False

• I don't know

Draw an Electromagnet Circuit