What does a reading of 0.790 MΩ indicate?

A reading of 0.790 MΩ indicates a resistance value of 0.790 megohms. The prefix 'M' in this context stands for mega, which means million, so 1 MΩ is equal to 1,000,000 ohms. Therefore, to convert megohms to ohms, you multiply by 1,000,000.

For 0.790 MΩ, the calculation would be:

0.790 MΩ x 1,000,000 = 790,000 ohms, or 790 kΩ.

This conversion confirms that the resistance indicated by the measurement is indeed 790 kΩ, aligning perfectly with the correct choice. Understanding such conversions is critical in electrical work, as resistance values are often expressed using different units depending on the context, and recognizing the correct scale of measurement is essential for accurate communication and troubleshooting.