What does the symbol MΩ stand for in resistance measurements?

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Multiple Choice

What does the symbol MΩ stand for in resistance measurements?

MΩ stands for megaohm, a very large resistance value. In the SI system, the prefix M means 10^6, so a megaohm equals 1,000,000 ohms. This prefix is used for high-resistance measurements, such as insulation or leakage tests, where you’re dealing with millions of ohms rather than tiny fractions. The other prefixes shown would indicate much smaller resistances: milliohm is 0.001 ohms and microohm is 0.000001 ohms, so they don’t match the symbol MΩ.

MΩ stands for megaohm, a very large resistance value. In the SI system, the prefix M means 10^6, so a megaohm equals 1,000,000 ohms. This prefix is used for high-resistance measurements, such as insulation or leakage tests, where you’re dealing with millions of ohms rather than tiny fractions. The other prefixes shown would indicate much smaller resistances: milliohm is 0.001 ohms and microohm is 0.000001 ohms, so they don’t match the symbol MΩ.

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