The National Grid Flashcards
The electricity powering the National Grid is produced by a power station turning a _____________:
a device that converts kinetic energy into electric energy.
generator
What is a transformer’s function?
To increase or decrease the potential difference of an alternating current.
How are transformers used in the National Grid?
To change voltage and current in transmission lines.
Why are step-up transformers used in the National Grid?
To increase the _________________ of the wires.
Which ___________ current.
Therefore reducing _______________ from the wires.
potential difference
reduces
energy loss
Do transmission lines have a low voltage or high voltage?
High voltage.
Increasing voltage _____________ current.
Decreasing voltage ____________ current.
decreases
increases
A transformer is formed from two ________________ around a _____________________.
coils of wire
magnetic core
A transformer is formed from two ________________ around a _____________________.
coils of wire
magnetic core
What is the function of a step-down transformer in the National Grid?
Reduces the ___________ from ___________________ to the safer voltage of ________ for home use.
voltage
transmission lines
230V
