What is Ohm’s Law?
This was derived by a German physicist named as Georg Ohm (1789-1854),
Ohm’s Law is a formula used to calculate the relationship between Voltage, Current and Resistance in an electronic circuit.
In electronics, Ohm’s Law (E = IR) is as fundamentally important as Einstein’s Relativity equation (E = mc²) is to physicists.
E = I x R
Which is voltage = current x resistance, or volts = amps x ohms, or V = A x Ω.
In Ohm’s Law each alphabets stands as below which is used in our day to day electronics and in circuits we work on:
|Unit of measure|
|Role in circuits||In case you’re wondering:|
|Voltage||E||Volt (V)||Pressure that triggers electron flow||E = electromotive force (old-school term)|
|Current||I||Ampere, amp (A)||Rate of electron flow||I = intensity|
|Resistance||R||Ohm (Ω)||Flow inhibitor||Ω = Greek letter omega|
If two of these values are known, technicians can reconfigure Ohm’s Law to calculate the third. Just modify the pyramid as follows: