Resistance Converter
Ohm (Ω)
Definition: The ohm (symbol: Ω) is the SI derived unit of electrical resistance. It is named after German physicist Georg Simon Ohm and is defined as the resistance between two points of a conductor when a constant potential difference of one volt applied to these points produces a current of one ampere.
History/origin: The unit was formally defined in 1861 by the British Association for the Advancement of Science. It was part of Georg Ohm's discovery of Ohm's Law, which states that current is proportional to voltage and inversely proportional to resistance.
Current use: The ohm is the standard unit for measuring resistance in all types of electrical circuits, components (like resistors), and electronic devices.
Megaohm (MΩ)
Definition: A megaohm (symbol: MΩ) is a unit of electrical resistance equal to one million (1,000,000) ohms.
History/origin: The prefix "mega-" was adopted to describe the immense resistance provided by insulating materials, which is crucial for electrical safety and preventing short circuits.
Current use: Megaohms are primarily used in testing the insulation of motors and transformers, high-voltage equipment safety checks, and in specific high-impedance amplifier circuits.
Ohm (Ω) to Megaohm (MΩ) Conversion Table
| Ohm (Ω) [ohm] | Megaohm (MΩ) [meg] |
|---|---|
| 0.01 ohm | 0.00000001 meg |
| 0.1 ohm | 0.0000001 meg |
| 1 ohm | 0.000001 meg |
| 2 ohm | 0.000002 meg |
| 3 ohm | 0.000003 meg |
| 5 ohm | 0.000005 meg |
| 10 ohm | 0.00001 meg |
| 20 ohm | 0.00002 meg |
| 50 ohm | 0.00005 meg |
| 100 ohm | 0.0001 meg |
| 1000 ohm | 0.001 meg |
How to Convert Ohm (Ω) to Megaohm (MΩ)
1 ohm = 0.000001 meg
1 meg = 1000000 ohm
Example: convert 15 ohm to meg:
15 ohm = 15 × 0.000001 meg = 0.000015 meg
Did You Know?
- Did you know? Electrical resistance is like friction for electricity. Every material has some resistance; materials with very low resistance are called conductors (like copper), while those with extremely high resistance are insulators (like rubber).
- Megaohms (MΩ) are used to measure insulation resistance. For example, the safety coating on an electrical wire must have a resistance of several megaohms to prevent electricity from leaking out!