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English 12 Public

Magnets, electromagnetism

Study Slideshow

Magnetism acquired by induction is purely _______________

Temporary

Magnetic field lines are directed in which direction outside the magnet?

north pole to the south pole

What direction does the tangent at any point on a field line give?

Direction of the magnetic field

If an iron rod is buried inside the earth keeping it along the north-south direction. What will happen to the metal?

It will turn into a weak magnet, if the earth behaves as a magnet.

Two places where the magnetic needle becomes vertical is termed as?

Magnetic Poles

The line joining the places where magnetic needle becomes horizontal, is termed as?

Magnetic equator

What will happen to the compass needle if placed at the neutral point?

It will rest in any direction

I- shaped magnet is made of what substance?

Soft iron

Permanent magnet is made up of what substance?

Steel

How can the polarity of the electromagnet be reversed?

by reversing the direction of the current in is solenoid

Identify the phenomenon

Magnetic induction

What kind of magnet is this?

permanent magnet