Question

If a DMM with 10 MÆ input resistance is used instead of the analog multimeter in Problem 39, what percentage of the source voltage will be measured by the DMM?

Answer 1

When using a Digital Multimeter (DMM) with a 10 MÆ input resistance instead of an analog multimeter, the percentage of the source voltage that will be measured is determined by the voltage divider rule.

Step-by-step explanation:

When using a Digital Multimeter (DMM) with a 10 MÆ input resistance instead of an analog multimeter, the percentage of the source voltage that will be measured is determined by the voltage divider rule. The percentage can be calculated using the formula:

Percentage = (Rm / (Rs + Rm)) * 100

Where Rm is the internal resistance of the DMM (10 MÆ) and Rs is the source resistance. The higher the source resistance, the lower the percentage of the source voltage measured.