Circuits 🔋🔌

• The formula for Ohm's Law is I = V/R, where I is the current in amperes, V is the voltage in volts, and R is the resistance in ohms.
• The symbol for joule is J.
• A cell stores chemical energy.
• The unit for energy is joules (J) or kilojoules (kJ).
• The electrical component that limits the flow of electrical current where the resistance doesn't change is a resistor.
• The unit of potential difference is volts (V).
• The unit of current is Amps (A).
• The electrical component that has a high resistance at low temperatures, and a low resistance at high temperatures is a thermistor.
• The electrical component that measures potential difference in units of volts is a voltmeter.
• The electrical component that allows current to pass through it only one way is a diode.
• The electrical component that stores charge when connected to a battery is a capacitor.
• The electrical component that measures current in amperes is an ammeter.
• The symbol for time is t.
• Charge is what we use to quantify the billions and billions of electrons flowing at any one point.
• The electrical component that is used to turn a circuit on and off is a switch.
• Electrons transfers energy as they flow through the metal wire.
• A parallel circuit has junctions.
• Metals are good conductors as they have many free outer electrons which are free to move.
• The electrical component that stops the electric current flowing if too much electric current causes a thin metal filament to melt and break is a fuse.
• I = ? / t

  Q
• A series circuit is when there is only one pathway for the electricity to travel around the circuit.
• In a series circuit, all components are connected end-to-end so that the same current flows through them all.
• The correct term to use instead of voltage is potential difference.
• Current (I) is measured in amps (A).
• Resistance (R) is measured in ohms (Ω).
• Power (P) is measured in watts (W).
• Electricity can be transferred from place to place by using conductors such as copper wire or aluminium foil.
• If the resistance of a component increases, then the current will decrease.
• Ohm's law states that the current flowing through a component is directly proportional to its potential difference across it.
• Insulators do not allow electricity to pass through them because there are no free electrons available to carry charge.
• The equation for Ohm’s Law is V = IR where V is voltage, R is resistance, and I is current.
• In parallel circuits, there are two or more paths for electricity to flow along.
• In series circuits, all components are connected end-to-end with no branches.
• The symbol for an insulator is a square box with a diagonal line drawn through it.
• Electrical work is done by the electrons as they pass through the component.
• The electric current is higher, if there are a lot of electrons flowing per second.
• Current (I) = Charge (Q)/Time (t)
• Power (P) = Voltage (V) x Current (I)
• Resistance (R) = Voltage (V)/ Current (I)
• The electrical component that is made up of two or more cells connected end-to-end is a battery.