Electricity Type of currents Moving charges Ohm low Power Electricity: Moving charges Posted on October 24th, 2008 by Technology Department ENERGY CHANGES IN A SIMPLE ELECTRIC CIRCUIT The electric power in watts represents the rate at which energy is converted from electrical energy to some other form of energy, e.g., […]
Electricity Type of currents Moving charges Ohm low Power Resistance: Ohm´s Law What is Electrical Resistance? When electrons flow through a bulb or another conductor, the conductor does offers some obstruction to the current. This obstruction is called electrical resistance. The longer the conductor higher the resistance. The smaller […]
Electricity Type of currents Moving charges Ohm low Power Electricity: Moving charges ENERGY CHANGES IN A SIMPLE ELECTRIC CIRCUIT When current flows in a conductor, heat energy is given out at every point in that conductor. This energy comes from the battery (or other source, e.g. a generator) that […]
Electricity Type of currents Moving charges Ohm low Power Types of currents. ac/dc What does it mean: ac/dc? Ok, apart from a rock group? There’re two types of current, defined based on the directions of the movement of the electrons. An electric current is called a direct current (d.c.) […]
Electricity Type of currents Moving charges Ohm low Power Let’s Explore Electricity!. The movement of the electron Electricity is the most widely used form of energy. Electricity run our fridges, washing machines and in general, all electrical appliances in the kitchen. Electricity will probably power all future cars’ motor. […]
Metals Metals2 Metals Activities Metals activities for secondary school students Metals activities A fantastic BBC video about the Blast Furnace A blast furnace is used for smelting to produce iron. In a blast furnace, iron ore, limestone and coke are continuously supplied through charging hole (the top of […]
Metals Metals2 Metals Activities Metals. No ferrous metals. Copper, Silver .. Metals on earth Apart from ferrous metals, there are other metals which are used alot in technological appliances. It is worth highlighting the use of (among others) copper, bronze, aluminium etc Pure non-ferrous products. Aluminium […]