24/06/2026
⚡Ohm's Law⚡
We have already learnt about electrical voltage U, electrical resistance R and current I. Together, they form one of the most important fundamental formulas in electrical engineering: Ohm’s Law , which demonstrates how these three quantities influence one another.
The easily rearranged basic formula of Ohm’s Law is: U = R × I (voltage = resistance multiplied by current). This leads to the following conclusions:
• Constant resistance — more current flows when the voltage is increased.
• Constant voltage — less current flows when the resistance increases.
To summarise simply:
• Voltage ‘pushes’ the electrons.
• Resistance ‘slows them down’.
• The current indicates how many electrons are actually flowing.