Battery stores chemical potential energy, transferred to electrons which move through wires, creating a current from positive to negative terminal, energy converted into light and heat by the bulb, electrons pushed back to the battery to be refilled with energy
Measuring current with an ammeter
Must go in series with the component to measure the current
Electricity
The flow of charge or charges like electrons carrying energy from a source to a component where the energy is released as another type of energy
Resistance
Property of components resisting the flow of current, necessary for components to work
Measuring PD with a voltmeter
Always connected in parallel to components, measures energy supplied to electrons
A diode only lets current flow through in one direction, with very high resistance in one direction and very low in the other
Power in electricity can also be calculated as Power (P) equals Voltage (V) times Current (I)
Blue wire is the neutral, Brown wire is the Live, Yellow and green wire is the earth wire for safety
If the resistors don't have the same resistance
Current is the same for both
Transformers are used to reduce energy loss due to resistance in cables. A Step-Up Transformer increases transmission voltage to over 100,000 volts, reducing current and energy loss. A Step-Down Transformer then reduces the voltage back to a safe 230 volts
