CLASS 8 · LEARNING KNOWLEDGE
Voltage and current – basic principles
How it works
Voltage (U) is the driving force that moves electric charge through a conductor. It is measured in volts (V). Current (I) indicates how much electric charge flows through a conductor per second, measured in amperes (A). Voltage and current are fundamental quantities of the electric circuit. In simple circuits, the following applies: the higher the voltage at the same resistance, the greater the current. Current flows only when the circuit is closed.
Note
Voltage is the cause of the current flow; current measures the amount of charge transported per unit time. Current flows only when there is a closed connection between the poles of a voltage source.
Voltage is the cause of the current flow; current measures the amount of charge transported per unit time. Current flows only when there is a closed connection between the poles of a voltage source.
An example
What unit does current have?
Current is measured in amperes (A). This can be seen from the fact that the formula symbol for current is I and the SI unit for it is ampere.
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50 Exercises
To the learning unit →Own explanation and own practice exercises by AmyMath. Subject reference framework: Physics. The topic assignment may vary by federal state.