Current Electricty Flashcards
Conductors
Are substances with allow current to flow through the them freely
Insulators
Are substances which do not allow electricity to flow through them
Electric Current
Is a flow of electric charge
Closed circuit
A closed circuit is needed for the current to flow, if there is a break in the circuit the the current won’t flow.
-> energy can’t get through
Energy provided
By a battery or power pack, it is needed to move the current around the circuit
The battery pumps electrons forms it’s negative end around a circuit
from it’s negative end around a circuit
The electrons are attracted
Back to the positive end of the battery
Potential difference
The difference in electrical pressure between the positive and negative ends of a battery/power pack
Whenever there is a potential difference
Electricity will flow
The potential difference is known as ______
Voltage and is measured in volts
Resistance
Is the opposition to the flow of electrons. The unit is Ohm, and it’s measured using an Ohmmeter
Resistor
If placed in an electric circuit, it will slow down the flow of electrons
Ohm’s Law
Ohm’s law states that voltage is directly proportional to current
Heating effect
Boil water in a kettle, immersion heater, electrical cooker, fuse in plug
Chemical effect
Electroplating cheap metal with more expensive metal e.g. silver, electrolysis (splitting) of water, mobile phone battery
Magnetic effect
Electromagnet made with a wire wrapped around a nail, electric motor, speakers, circuit breaker in fuse board
