Electrical current is the rate at which charged particles flow, usually through a conductor. The drift velocity is the average…
Cells and batteries (both sources of electricity) have resistance, this resistance is called internal resistance. Internal resistance is caused by…
If components in a circuit aren’t connected consecutively and are on different branches of the wire they are said to…
Kirchhoff’s First Law Kirchhoff’s first law is a consequence of the conservation of charge and states that: The sum of…
Resistivity is a property of a material that quantifies its resistance to an electric current flowing through it. The resistivity…
Electrical Power (P) – the rate at which electrical energy is transferred. This is exactly the same as mechanical power…
Resistance (R) – the resistance of a device is the ratio of the voltage applied to it, to the current…
Potential Difference Potential Difference (p.d.) – the electrical energy transferred per unit charge when electrical energy is converted into any…