Ohm's Law
Currents, voltage and resistance
What Is Ohm's Law?
Ohm's Law represents the relationship between voltage (V) and current (A).
Ohm's Law states that the voltage across a circuit is proportional to the current through it. The constant would be the resistance (Ω/R).
Ohm's Law states that the voltage across a circuit is proportional to the current through it. The constant would be the resistance (Ω/R).
Current
Current electricity is defined as the flow of electrically charged particles. This can be divided into two types of currents:
- DC (Direct current)
Direct current flows in one direction.
DC is available in batteries - AC (Alternating current)
Alternating current periodically reverses the direction in which it flows.
AC is available from wall outlets
Voltage
Voltage is the potential difference in a circuit. Voltage can be stored energy, which in order to use, must be connected in a circuit.
An example of a source of voltage would be a common household item, a battery.
This can power many things such as a TV remote, a flashlight or a radio.
An example of a source of voltage would be a common household item, a battery.
This can power many things such as a TV remote, a flashlight or a radio.
A Video To Explain Ohm's Law Even Further
MAKE presents: Ohm's Law