AC & DC & The National Grid
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10 Terms
What is AC?
Alternating Current
What is DC?
Direct current
What is the Difference between AC & DC?
AC alternates current and DC is direct current and can only go in 1 direction
What is an example of Direct current?
Cells and batteries because they have a fixed direction or Potential difference
What is the National Grid?
A system of cables and transformers that supply electricity to our homes
What does a Step up transformer do?
Increases Voltage and Decreases Current
What does a Step Down Transformer do?
INCREASES Current & DECREASES Volatge
How does The National grid Work?
The national grid carries generated electricity over long distances at high voltage and low current to be efficient and non-wasteful. Before it reaches our homes, a step-down transformer decreases the voltage for safety and increases the current.
What is the standard voltage and frequency of the domestic electricity supply in the UK?
230 Volts & Frequency of 50 hz
What is the equation linking Charge flow Current & time?
Q= IT