SCIENCE 10 SEMI-FINALS

The first to discover that lodestone or natural magnets has two magnetic places.

(History of Magnets)

Before the term magnet was used, Greeks called this material as __________.

The Greeks found lodestones/magnet more than 2000 years ago in a coastal district of ________, ______.

Where did the term Magnetism came from?

Is an iron rich ore mineral had an amazing property of attracting pieces of iron.

Queen Elizabeth's physician rubbed an iron with loadstone and was able to make an artificial magnets. He was able to discover the magnetic property of iron.

Are objects that has strength that attracts certain magnetic materials.

Is a force of attraction or repulsion that acts at a distance. It is due to a magnetic field, which is caused by moving electrically charged particles or is inherent in magnetic objects such as magnet. The magnetic field of an object can create a magnetic force on other objects with magnetic fields.

In 1820, a Danish physics school teacher discovered that electric current has an effect on magnetic compass. He is credited for the discovery of electromagnetism. He noticed that the needle of a compass moved when it was placed near a current currying wire when he was preparing a demonstration on a voltaic pile. He wondered what caused the deflection of the compass needle. He knew that a compass needle is deflected when he placed in a magnetic field, and let to believed that a current currying wire generates its own magnetic fields.

A French physicist, proposed that electric current is the source of all magnetism, verified Oersted's idea. Was the first scientist to mathematically describe the basis or electromagnetism.