QUESTION 3 A Single Phase 220v,2KW Heater is connected across a Single phase 60HZ Supply with 311 Volts peak through an SCR .For firing delay of 600. calculate : Power absorbed by the Heater Element • Conduction angle • Extinction angle. • Turnoff time. • Draw the waveforms

match column a to b. Electricity flows from the power plant Through wires to the step-up transformer. The transformer raises the voltage so it can travel long distances - it is raised as high as 756,000 volts. Electricity is generated in the power plant by hydroelectric, nuclear, wind or geothermal energy. The electric current then runs through the power lines to the substation transformer where voltage is lowered to between 2000 and 13000 volts. The turbine spins a huge magnet inside a copper wire. Heat energy converts to mechanical energy which then converts to electrical energy in the generator. From there, electricity comes into your home through a service box, where your heter IS located to electrical consumption. measure your Wires Taice electricity around your home, powering your lights and all your other electrical appliances. Electricity is then taken through the lines to a pole transformer or transformer box if underground then the voltage is lowered again to 120 or 220…

a 500-up synchronous motor is connected to 2300 volts. The motor is to operate at 90% power factor. What running current would be used to compute the conductor size and fuse size.