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When the electricity reaches the substation to be distributed locally, there is a step-down transformer which decreases the voltage again and increases the current.
All the systems in the national electricity grid are connected and this means that a power surge or a grid overload can cause blackouts and disruptions throughout the network. A power surge is a sudden increase in the voltage somewhere in an electric circuit.
Try to arrange an excursion to a power plant or ask if an engineer is able to come to the school to explain how the power plant operates and to answer questions posed by the learners.
A "Certificate of Completion" will be available to each student at the end of each activity.
Details and get access to This is an interactive exercise about Geologic Time.
The power surge causes an increase in the current strength.
This sudden increase in the current strength can damage sensitive circuits.