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:zap: Energy :zap:and Circuits (Current is the rate of flow of charge…
:zap:
Energy :zap:and Circuits
The Uses of Parallel and Series circuits
Series
All components are connected
If one is removed/ broken the whole thing stops
Only useful for a couple of things e.g.: Fairy lights
The current in a series circuit depends on applied voltage and the number and the nature of other components
Parallel
Each component is connected to the +ve and -ve supply
If you remove a component the others won't be affected
Each component it connected to the circuit on its own loop
Eg: Houses with different lights and light switches
Current is the rate of flow of charge
Q=IxT
#
Charge = Current x Time
Current in a metal wire is a flow of negatively charged electrons
Current varies with voltage in wires, resistors, diodes, etc
Lamps and LEDs can be used to indicate current
V=IR
The resistance increases in an LDR as it gets darker
The resistance in a thermistor decreases with a rise in temperature
A voltmeter should be added to a circuit in parallel
An ammeter should be connected in series
Some wires have more resistance than others
Some metals conduct better than others
When a metal is heated up, the atoms move about more and so electrons are more likely to collide with them. This slows down the electrons.
Different types of resistor :!:
:fire: Thermistor
:flashlight: LDR
Variable Resistor
