They are in the middle of the atom (the nucleus) and they don’t move. They have a positive charge.
20
Do electrons move?
Yes, they do.
15
What do you need to use electrical current?
A c....., a p....... and something to use the electricity.
A circuit, a power source and something to use the electricity.
15
What are the five components of electrical circuit?
power sources, conductors, loads, control elements and protection elements.
20
What are the most common power sources?
Batteries and AC power supplies.
20
To connect electrical devices to the primary alternating current supply (AC) in a building we use p........ and s..........
plugs and sockets
15
............................conduct the electric current from the battery to the load, passing through the control elements and back to the battery.
(Insulators/ Conductors/ Switches /Fuses)
Conductors
20
Usually, the conductors are wires made of .................... and covered in plastic.
(plastic, glass, copper, iron, wood)
copper
15
Which is the part of the circuit that consumes electricity?
The load
20
The loads that convert electrical energy into heat are.......
(bulbs, buzzers, motors, resistors)
resistors
15
....................give a continuous sound when current flows through them. They are often used in alarm systems. (bulbs, buzzers, motors, resistors)
buzzers
15
Are switches protection elements?
No, they aren't.
15
Are fuses protection elements?
Yes, they are.
15
Which is the unit to measure the electric current?
Amps
15
Which is the unit to measure the electrical power?