Final answer:
The electrical level is measured as voltage, which is the electric potential difference and typically measured in Volts (V). Voltage is the potential to do work, analogous to an object's height, and is related to electric power and current flow.
Step-by-step explanation:
The electrical level is measured as voltage, which represents the electric potential difference between two points. Voltage can be thought of as analogous to the height at which an object is lifted, with a higher voltage indicating a greater potential to do work when released, similar to an object being higher up on a shelf. Voltage is typically measured in units of Volts (V).
In practical terms, when you measure the potential difference across a battery's terminals in a circuit, you are measuring the terminal potential difference.
Electric power is the rate at which electrical energy is supplied or used, and it is calculated by multiplying current by voltage. In a medical context, voltage is monitored through devices like the electrocardiogram (ECG), which records voltages related to heart activity.
The flow of electrons, or electrical current, is defined as the rate of flow for any charged species and is measured in amperes (A), where 1 ampere is equivalent to one coulomb per second.