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Last edited 26 days ago by Learn LoopHQ.

Answer key

Chapter: 07. Magnetism

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More the number of turns of the coil, _ _ _ _ _ _ _ _ _ _ _ _ _ _ powerful is the electromagnet.

The imaginary line joining the two poles of a magnet is called the _ _ _ _ _ _ _ _ _ _ _ _ _ _.

The first natural magnet to be discovered was _ _ _ _ _ _ _ _ _ _ _ _ _ _, an iron ore.

Permanent magnets are usually made of _ _ _ _ _ _ _ _ _ _ _ _ _ _.

_ _ _ _ _ _ _ _ _ _ _ _ _ _ poles of two magnets repel each other.

Bar magnets should be kept in pairs with their _ _ _ _ _ _ _ _ _ _ _ _ _ _ poles lying side by side.

The method of magnetising a magnetic material by rubbing a single bar magnet against it is known as _ _ _ _ _ _ _ _ _ _ _ _ _ _ method.

The region around the magnet where its magnetic influence can be felt is called the _ _ _ _ _ _ _ _ _ _ _ _ _ _ of a magnet.

Maglev trains float over a guideway using the basic principles of _ _ _ _ _ _ _ _ _ _ _ _ _ _.

The attractive property of a magnet is always maximum at the two ends, called _ _ _ _ _ _ _ _ _ _ _ _ _ _ of the magnet.

Magnetic poles always exist in _ _ _ _ _ _ _ _ _ _ _ _ _ _ and can never be separated.

Each magnetic line of force is a _ _ _ _ _ _ _ _ _ _ _ _ _ _ continuous curve.

Objects made of _ _ _ _ _ _ _ _ _ _ _ _ _ _, cobalt, nickel and their alloys can be attracted by magnets.

The Earth’s magnetic south pole is near the geographic _ _ _ _ _ _ _ _ _ _ _ _ _ _ pole.

Electromagnets are used by surgeons for removing _ _ _ _ _ _ _ _ _ _ _ _ _ _ bits from wounds.

The magnetic properties of a magnet can be destroyed by _ _ _ _ _ _ _ _ _ _ _ _ _ _ the magnet to a very high temperature.

Magnetism is an invisible force that pulls certain substances such as _ _ _ _ _ _ _ _ _ _ _ _ _ _ and steel towards a magnet.

The phenomenon by which an ordinary piece of iron acquires magnetic properties temporarily, due to the presence of another magnet near it, is called _ _ _ _ _ _ _ _ _ _ _ _ _ _.

A horseshoe magnet is a magnet bent in a _ _ _ _ _ _ _ _ _ _ _ _ _ _ shape.

The direction of magnetic lines of force is always from the _ _ _ _ _ _ _ _ _ _ _ _ _ _ pole to the south pole externally.

Substances that are attracted by a magnet are called _ _ _ _ _ _ _ _ _ _ _ _ _ _ substances.

Magnetic lines of force are maximum near the _ _ _ _ _ _ _ _ _ _ _ _ _ _ where the magnetic field is strongest.

An _ _ _ _ _ _ _ _ _ _ _ _ _ _ consists of a soft-iron core that gets magnetised when a current is passed through a coil of wire wound around it.

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