Chemistry Location

Magnetic effect of current means that an electric current flowing in a wire produce a magnetic field around it. Oersteds Experiment • Electromagnetism what discovered by Hans Christian Oersted. •  In his experiment he accidentally found that a compass needle got deflected when an electric current passed through a metallic wire is placed near by it. • According to him deflection of compass needle was due to the magnetic field produced by electric current. • Therefore, Electric current flowing through a metallic conductor (copper wire) always produces/give rise a magnetic field around it. • So electric current carrying wire behave like a magnet. • Through this observation Oersted show that electricity and magnetism are linked to each other. Magnetic fields • The region/space/area around/surrounding a magnet in which the magnetic force of attraction or repulsion can be filled/experienced/exerted/detected by other ferromagnetic materials , magnets, moving charge etc

Electricity • The branch of physics which deals with the study of charge in motion/flow of charge is called electricity. • A stream of electrons moving through a conductor constitutes an electric current. • It is a form of energy for a variety uses in homes, school, hospital, industries and so on. Electric Charge • It is the property associated with a matter due to/by which it attract or repels other material. • Its SI unit is coulomb (C). • It is denoted by `Q`. Properties of charges • It is a scalar quantity • Like charges repel and unlike charges attract each other. • Charges can neither be created nor be destroyed and it remains constant. There are two types of charges 1. Positive charge Magnitude of charge on one proton is +1.6×10̄  ̄¹⁹C. 2. Negative charge Magnitude of charge on one electron is -1.6×10  ̄¹⁹C Quantization of charge The quantization of charge is the property by virtue of which every charge exists only in discrete values. Q = ne . Where, n is number of electron e is

The Human Eye : • The human eye is one of the most valuable/significant sensitive light sensing organ which helps/enable us to see the beautiful / wonderful colorful world & object around us. • It is the natural optical Instrument. • It has lens (convex) in its structure. • It works on the refraction of light. • It is spherical in Shape like a ball of diameter about 2.3 cm. The main/essential parts The human are: 1. Cornea: • Light enters the eye through a thin, transparent membrane is called cornea.  • It is front projected part of eye bulging outwards. • Light first enters our eye through this.  • It refracts most of the incident light into the eye. • It protect eye from foreign agents like dust. 2. Aqueous humour: • Between the cornea & eye lens, their is a space filled with transparent Liquid (water like consistency) called Aqueous humour.  • It helps the refracted light to be focused on retina • It also provides nutrition to eye as well