Look at the the AC voltage measurement and explain why you must check both AC an

Question

Look at the the AC voltage measurement and explain why you must check both AC and DC ranges when measuring an unknown voltage? (Imagine a large AC or DC voltage measured with the opposite range!) When you measure an unknown current, why should you always first measure the current using the 10A range, and measure for both AC and DC current before you use the mA measurements, and why should you always move the red meter lead back to the V ohm Hz jack immediately after completing current measurements?

Explanation / Answer

For a unknown voltage measurements, we need to check for AC and DC modes, if input signal is DC, and measured using AC mode then our reading will approximately zero, because it will show RMS value

If input signal is AC, and measured using DC mode then our reading will be average value of AC, not the RMS (we require RMS value)

B) using V ohm mA port we can measure voltage, resistance and current up to 200mA. So while measuring current we will use 10A port, for remaining all we use V ohm mA port. So normally multimeter red jack is connected to this only

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