10.3 Electrical circuits Flashcards
Electric circuits
are the pathway travelled by electrical energy
energy source/power supply
pushes electrons around the circuit and provides the electrical energy eg. battery
energy user/load/resistor
converts electrical energy into other useful forms of energy eg. light globe
A CONDUCTING PATH
allows electrons to flow around the circuit eg. wires
What are gaps
A switch in circuits that control the flow of electricty
where does electricity come from
- coal(mostly)
- natural gas
- nuclear energy
Alternatives from burning fossil fuels(better alternatives)
energy from the sun, wind and water(hydropower)
Why do we still use fossil fuels even though we shouldn’t
There are lots of companies that produce oil and there’s a lot of money invested in it. It’s also more effiecent.
When are electric currents formed
whenever there is electron flow.
How do you produce a larger current?
create a large electron flow
what unit is current measured in
Current is measured as ampere
Ammeters
Ammeters measure the amount of
electrons that flow through a circuit per second
measures current
Voltage
Voltage is a measure of the amount of forceneeded to move electrons in
the circuit.
Open circuit
An electric circuit that is brokenpreventign electrons from flowing around the whole circuit
How can energy in a electric circuit be transformed
The energy in an electric circuit can be transformed into sound or
light as it moves through a speaker or globe.
Potiental difference
The difference in energy
Voltage is measured in
volts = V
What can current be compared to(analogy)
the flow of water through a hose,
What can voltage be compared to(analogy)
water pressure at the Tap/pump
3 essential features of all electric circuits with examples
Voltage(power supply/energy source)-battery
Load/resistor-light bulb
Conductor-wire
Simple circuit
A circuit with 3 necessary componets-voltage,conductive path and resistor/load
What intstrument is current measured with
ammetre
List three changes that can be made to an electric generator to increase the size of the electric current it produces.
increasing the speed of rotation of the coil
increasing the strength of the magnetic field
increasing the number of turns on the coil.
polarized electrical component
a part with polarity, can only be connected in a circuit in one direction.
