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Q: Why the reading on voltmeter may not be accurate?
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Related questions

What is the voltmeter reading this time?

positive terminal


Why potentiometer is more accurate than voltmeter?

volt meter draws current from the device whose reading is to be taken and potentiometer does not draw current from the device so it is better to use potentiometer than voltmeter


Why is the resistance of volt meter very high?

So it doesn't effect the circuit being tested. If a low impediance or resistance meter were inserted in the circuit, voltages may drop and effect the accuracy of the test. Any voltmeter will use some power from the circuit to make a reading. A "high impediance voltmeter" will use very little power from the circuit so the voltage reading will be as accurate as it can be.


Which type digital voltmeter is the of fatest all digital voltmeter?

You mean fastest? Digital voltmeter gives reading in seconds.


What is the use of universal high resistance voltmeter?

A voltmeter must have a very high resistance to measure voltage. A voltmeter is placed in parallel with the element that you are measuring. If the voltmeter has a low internal resistance, then all of the current will flow through the voltmeter instead of the element. You want all of the current to flow through the element, to get an accurate reading of the voltage. Conversely, an ampmeter must have zero resistance, because it is placed in series with the element.


What to do when voltmeter gives negative reading?

Cross the beams.


What does a digital voltmeter do?

A voltmeter works by measuring the amount of volts of electricity being given by an electrical line or battery. A digital voltmeter has an easier to read display and is also more accurate.


Will the rusting of nails in a sodium chloride - water solution effect the reading off a voltmeter or ammeter?

An ammeter or a voltmeter gives the reading of the flow of current, which is due to the movements of ions. When a rusted nail is immersed in the solution it will add the no of ions into the solution. This will increase the ion concentration and therefore will change the reading of a voltmeter and ammeter.


An accurate voltmeter must have an internal impedence of?

very high value


A multirange voltmeter which scale is numbered from 0 through to 250 the pointer falls mid range on the scale interpret the reading on the meter?

With the pointer mid range on the scale, the reading of the multi-range voltmeter would be 125 volts.With the pointer mid range on the scale, the reading of the multi-range voltmeter is 125 volts.


Can you move your temp sensor from location between?

Depending where you move it to, you may not get a accurate reading.


A 100 V voltmeter has full scale accuracy of 5 percent At its reading of 50 V it will give an error of?

A 100 V voltmeter has full-scale accuracy of 5%. At its reading of 50 V it will give an error of