8.- English Worksheet Questions Flashcards
(8 cards)
An electrical ______ allows electric current to pass through, while an electrical ________ does not allow electric current to pass through.
Conductor, insulator.
Flow of electricity is called _______, the unit is ____, with the symbol ______.
Electric current, Ampere, A
________ is the energy change of charges between any two points when crossing a circuit. The unit is ______, with the symbol ______.
Voltage, Volt, V
The unit of resistance is _____, with the symbol ____.
ohm, Ω
Connecting too many appliances in one mains socket at home may lead to ________, so _____ should be installed to avoid such potential risks.
Overloading, fuses.
An _____________ is a metal coil which behaves like a magnet when an electric current flows through it.
Electromagnet.
A ______ has a variable resistance. It can be used to control the size of the electric current in a circuit.
Rheostat.
What’s Hong Kong mains electricity voltage?
220V.
