Kalics

  An introduction to Ohm's law, Resistance and Joule’s Law       1)  Electric current  :- Electric current   is the flow of electrons through a conductor. The device which causes the flow of electrons through a conductor is called a  cell. Electrons flow from the negative terminal to the positive terminal. Electric current flows from the positive terminal to the negative terminal. This is called conventional current.   Electric circuit   is a continuous and closed path of an electric current. Definition  :-  " The rate of flow of charges through a conductor or the quantity of charges flowing through a conductor in unit time." I =  current = Q / t where Q – quantity of charge,  t – time The SI unit of electric charge is  coulomb (C).  It is the charge contained in 6x10  18  electrons. The SI unit of current is called  ampere (A). One ampere is the current flowi...

  Basics of Electricity and Magnetism      Many fundamental, or subatomic, particles of matter have the property of electric charge. For example, electrons have negative charge and protons have positive charge, but neutrons have zero charge. Definition :    Electric charge is the property of subatomic particles that causes it to experience a force when placed in an electromagnetic field. Explanation:    Electric charge is the basic physical property of matter that causes it to experience a force when kept in an electric or magnetic field. Properties: 1. There are two kinds of charge, positive and negative 2. Like charges repel, unlike charges attract 3. Positive charge comes from having more protons than electrons; negative charge comes from having more electrons than protons 4. Charge is quantize, meaning that charge comes in integer multiples of the elementary charge e 5. Charge is conserved. The algebraic sum ...