What is the unit of electrical strength?

The unit of electrical strength is best represented by the volt. Electrical strength, in terms of electrical potential difference, is expressed in volts. It indicates the amount of energy per unit charge that is required to move electrons through a conductive medium or to create a flow of electricity.

To clarify further, while the other units listed are essential in the study of electrical systems, they represent different electrical properties. The ohm measures resistance, which is the opposition to the flow of electric current; the ampere measures the flow rate of electric charge, which quantifies how much charge passes through a circuit per second; and the milliampere, being a smaller unit of current, further divides this measurement. Each of these plays a unique role in understanding electrical systems but does not define the strength of electrical potential directly like the volt does.