Wenxi Technology

This simple project is about building a circuit that will be controlled by the light whether to switch ON or OFF the next circuits. The Diagram  LDR Project

Electrical charge (Q) Electromotive Force (emf) The voltage drop across the load(Vd) Ampere(A) Resistance(R) 1:Electrical charge (Q)         Electric charge is a physical property of matter which causes objects to experience a force when it is placed in an electric field When current flows, electrical work  is done and energy is transferred. The amount of charge passing a point in the circuit can be calculated using the equation: charge = current × time Q = I × t Example A current of 2 amps (A) flows through a simple electrical circuit. How many coulombs of charge will flow in 30 seconds? Q=I×t  Q=2×30 Q=60C Where I= Current(A) and t=  time 2:Electromotive Force (emf)          Electromotive Force is the amount of energy delivered per unit of electric charge by a power source such as a generator or a battery (abbreviated E or EMF) Emf equation ε=E/Q Where  ε= electromotive force, E=energy(Watt), and Q=Coulombs 3:Voltage dro...

  How electricity formed? By the force or pressure that pushes or forces electrons to move through the conductor in one direction. Source of electricity Friction Chemical  reaction Magnetism Heat Light Mechanical pressure  How above sources of electricity works? 1.Friction When certain materials are rubbed against each other, for instance, silk and glass rod or when you comb your hair (plastic and human hair). The atoms of both materials lose or gain an electron hence one of the two materials becomes positively charged and the other negatively charged. 2.Chemical  reaction  When two pieces of none similar metals are immersed into a chemical solution, the chemical process known as electrolysis will take place between metals and solution. This will cause one metal to lose an electron and the other to gain and hence pressure of force will be created between the two terminals of metals act as a source of electricity (The device called Cells or battery) 3.Heat This h...

Circuit breaker A circuit breaker is a switching device that interrupts the abnormal or faults current. When does the circuit breaker trip? Exceeded current is flowing through the circuit. The live and neutral wires are contacted (due to an overheated/melted component). A power line has ruptured, perhaps by driving a nail in the wall.