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TOPIC 7 Definitions Transformer- An apparatus for reducing or increasing the voltage of an alternating current Circuit breaker- An automatic device for stopping the flow of current in an electric circuit as a safety measure Fuse- An automatic device for stopping the flow of current in an electric circuit as a safety measure Ground wire- A wire drilled into the ground to prevent buildup of electricity Digital- is digitally controlled power products that provide configuration, monitoring, and supervisory functions which extends to full loop control Power- The rate at which electric energy is converted to other forms Short circuit- an electrical circuit of lower resistance than that of a normal circuit Assignment: 1. Describe the purpose and location in the power grid of: a) step-up transformers Going away form the power plant / increases current b) step-down transformers Towards your house / Reduces current 2. What is the difference between a fuse and a circuit breaker? A fuse can only be used once where as a curciuit breaker can be reset and used again 3. Describe three ways in which electric energy could be conserved with respect to home lighting. Turn off lights when you leave Use lower voltage Fluorescent bulbs instead of incandescing