Keywords and Definitions 🔑

• A cell is a chemical system in which certain chemical reactions cause the flow of electricity by means of an external circuit.
• A battery is when two or more cells are connected in series
• Potential difference is the work done per unit charge
• Resistance is a material’s opposition to the flow of electric current through it.
• Ohm's law states that potential difference across a resistor is directly proportional to the current flowing through it, provided its temperature remains constant.
• Electric current is the rate of flow of electric charge.
• A battery is when two or more cells are connected in series.
• Conductors are substances that allow electric current to pass through them.
• Insulators do not allow electric current to pass through it.
• Insulators do not conduct electricity because they have no free electrons.
• An electrolyte is a substance that conducts electricity via free ions that form when

  molten or in solution.
• Conventional current is charges that move from the positive terminal of a battery through the circuit to the negative terminal of the battery.