The National Grid Mains electricity is produced by ______________. Magnet Voltage Opposite Out Generator Circuit Electromagnetic Current Induced Coil The National Grid Mains electricity is produced by ______________. Generators produce a ___________ by a process called _____________________ induction. When a ___________ is moving into a coil of wire, a voltage is ___________ across the ends coil. If the ends of the ______ are connected to make a closed _________, a _________ will flow round the circuit. If the magnet is moving _____ of the coil, or the other pole of the magnet is moving into it, there is a voltage induced in the ____________ direction. Charles Merz opens the first UK major ___________ ____________ in 1901. In 1933 the Central Electricity Board sets up the UK’s first nationwide __.___. grid. The grid is updated in 1965 by adding 400kV _______. Voltage of electricity produced in ________ _________ is about 23kV. Transformers either ________ or ________ the voltage. UK National Grid The number of GW (1.3 EJ) used annually in the UK is ______ TWh. Mains electricity is produced by ___________. First nationwide _________ grid ran at 132kV, 50Hz. Mains __________ is in a.c. supply. A ______________ can change the size of an alternating __________. ELECTRICITY CANNOT BE ___________ ! kV: ________________ GW: ________________ TWh: _______________ EJ: _________________ Hz: _________________ Power = Potential Difference x ____________ Mains supply to our homes is __________ volts. X 100 __________ = Energy usefully transferred Total energy supplied