Magnets and electromagnet

What's the name of the natural magnet?

Where does the word “ magnet” comes from?

• The name of the shepherd

• The name of the metal

• The name of the place in which magnet was discovered

What's the working principle of the vehicle?

• A

• B

• C

Which one is not true?

• Magnets can attract cobalt, nickels, iron

• To induce a magnetism on a steel bar, it is enough to attach to a magnet.

• To demagnetize a magnet, you can place it into ac current

• No one above

You see two objects in the picture which one is magnetized?

Which point is north pole?

• A

• B

Looking at the field lines in this picture, these two magnets are ________

• Attracting

• Repelling

• Attracting and Repelling

• Doing nothing

What will the magnets in the picture do?

• Attract each other

• Repel each other

• Both attract and repel

• Neither attract nor repel

Permanent magnets are made out of which materials?

• Cobalt, Nickel, and Iron

• Copper, Chromium, and Cobalt

• Gold, Silver, and Platinum

• Copper, Nickel, and Iron