Chapter- Magnets

Magnetic Hill

IMAGE OF MAGNETIC HILL, LADAKH

Magnetic Hill is a so called “gravity hill” located near in Leh in Ladakh, , , India.

It is located on the Leh-kargil-Srinagar national highway, about 30 km

from Leh.

The Magnetic hill has become a popular stop for the domestic tourist

on car journeys.

The alignment of the road with slope of the background can the iilusion

that cars are able to drifts upwards.

Magnetic Hill, India

Tulsishyam, Amreli (Gujarat)

IMAGE OF MONCTON, CANADA

The magnetic hill is an example of gravity hill.

History

In the 19th century, a cart path was built from the city in the south onto the ridge.

During the age of automobile, ca. 1931, it was noticed that at one point

near the base of the ridge when south, motorists were required to

accelerate in order to prevent rolling backward (i.e., what appears to

be uphill)

Magnetic Hill, Moncton

What is the reason of that attractive pull???

Magnetite

A magnet attracts magnetic substances such as iron, cobalt and nickel, as well as some alloys.

Some of the Alloys are:

1. Alnico – Al (Aluminium), Ni ( Nickel), co (Cobalt)

2. Fernico- Fe (Iron), Ni (Nickel), co (Cobalt)

3. bismanol- bis (Bismuth), Man (Magnese), Iron

4. permalloy- Nickel-Iron mangetic alloy

Properties of Magnets

A freely suspended magnet always sets itself along the north-south

direction

A magnet has two poles, where its magnetic strength is maximum.

The two poles of a magnet cannot be separated.

Unlike poles attract each other and like poles of a magnet repel

each other.

A magnet can induce magnetism in other magnetic materials such

as iron. An iron nail when brought near a magnet, attracts other

smaller nails or pins.

Earth’s magnetic field, also known as geomagnetic field.

The earth’s magnetic field is believed to be generated by electric

currents in the conductive material of its core.

EARTH- BIGGEST MAGNET

Everybody in space emits electromagnetic waves, including human beings and has an important role to play in the maintenance of health.

Fluctuations in earth’s magnetic field caused by magnetic stroms (which occur on the sun).

Magnetism was discovered and used over 800 years in ancient Greece and china. They even had their own compass.

Rare earth magnets made up of Neodymium and Sanarium Cobalt are the strongest magnet.

All animals, including human, have magnetite crystals in their brains. Scientists believe that animal may navigate or migrate by sensing the pull of the cyrstals towards the earth’s magnetic poles

INTERSTING FACTS

Never !!

Place a magnet near computers,

televisons, watches, clocks, videos or credit

card. It may damage or distort these

products

Thank You