Physics

• CAPACITANCE – C, of capacitor defined as the ratio of the magnitude of the charge on either conductor to the potential difference between the conductors; The amount of charge a capacitor can store, per volt applied across it.
• ELECTRIC CURRENT – Is a flow of charge; The electric current in a wire is defined as the net amount of charge that passes through it per unit time at any point.
• ELECTRICITY – Studying about charges in motion.
• DIRECT CURRENT (DC) – Flow of electrons in one direction; car battery, flashlight batteries, photovoltaic (solar) cell.
• ALTERNATING CURRENT (AC) – Flow ofelectrons back and forth along a path.
• CONDUCTOR – Vessel of electricity.
• VOLTAGE – Potential difference, Electromotive force (EMF), Pushes the charges for them to flow, Measured in Volts (V).
• RESISTANCE ( R ) – Opposition to the flow f charge (from heat); They stop the electricity from flowing. (fan, phones, ipad); Measured in Ohms (Ω)
• RESISTIVITY – All materials haveresistivity; The SI unit of resistivity isOhms-metre (m)
• OHM’S LAW – Current is directly proportional to the applied voltage and inversely proportional to the resistance.
• ELECTRICAL POWER – Is the rate at which electrical energy is produced or consumed in a given time.
• SERIES CIRCUITS – A series circuit ismade by connecting the end of one device to the beginning of another.
• PARALLEL CIRCUITS – In parallel circuits, the same terminals of both devices are connected together.