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Q: A dc voltmeter may be used directly to measure?
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How do you measure 3 phase voltage?

Three phase voltage can be measure line to line (L1-L2, L2-L3, or L1-L3) with a quality digital voltmeter. In the United States, typical 3 phase voltage is 208-230VAC, or 460-480VAC measured line to line. Line to ground or neutral with a 208-230V system will yield 110-120VAC, which provides standard household power for things like televisions and microwave ovens.


What is cap height?

The cap height is a term used in typography. It is basically the line that shows how tall to make your capital letters. Cap height is the height from the baseline to the top of the uppercase letters in a font. It may or may not be the same as the height of the ascenders. Cap height is used in some systems to measure the type size.


What instrument measures current and voltage?

Voltmeter.Current and voltage are two different things. They are closely related but a current does not imply a voltage and nor does a voltage imply a current.A volt meter is used to measure a voltage. The voltage may be across a battery or other power source. It may be across a component such as a resistor or a group of components. If a current is flowing through a resistor, there will be a voltage across the resistor. Similarly, if there is a voltage across a resistor, there will be a current flowing.Current is measured using an ammeter - Current is measured in amps, hence the name of the meter.The two meters together can be used to analyze most electronic circuits and they are the two most important items of test equipment in electronics. Devices called multi-meters are combined ammeters and voltmeters and are in every electronics engineer's toolbox.


Can a transformer be used to power a deep fridge from a generator?

You power "type" must match. Most likely your generator should be able to have the fridge plug directly in, but you may indeed need a transformer to step the voltage up or down.

Related questions

What can a voltmeter do for you?

To be specific, a voltmeter is a tool used especially in science to calculate the differences of electric potential of two circuits. There are quite a few types of voltmeters and they are also quite portable which may be ideal for traveling with.


How are voltmeter connected to circuit?

Usually a voltmeter is connected across the load whether or not it is AC (Alternating current) or DC (Direct Current). A voltmeter is never connected in series with the load as this may cause serious injury or damage. The meter will absorb the full potential .


Is a digital thermometer a voltmeter?

may be


What is a voltmeter use for?

To be specific, a voltmeter is a tool used especially in science to calculate the differences of electric potential of two circuits. There are quite a few types of voltmeters and they are also quite portable which may be ideal for traveling with.


What instuments is used to measure an angle?

A protractor is used to measure angles.


What doesnt measure wind?

The voltmeter, hydrometer, odometer, frequency counter, spectrum analyzer, public opinion survey, and audio distortion analyzer do not measure wind. That said, however, a series of public opinion surveys may in some cases convey an indication of which way the wind is blowing.


What is voltmeter made up of?

The old voltmeters were an ammeter in series with a resistor (which set the range). Digital voltmeters may sense voltage directly or current through a resistor - and then use digital circuits to convert the reading into alpha-numerics.


Why digital multimeter fails to read low resistance values?

They read low resistance values very well. I measured several dead shorts today accurately with a digital voltmeter. However, when attempting to measure LARGE amount of resistance, the current generator in a standard digital voltmeter may fail to effectively penetrate the medium being measured. It is for this reason that Meggers (Mega-Ohmmeters) are used to measure high amounts of resistance. They usually employ a hand crank to develop the current needed to effectively flow through the medium being measured. Sometimes digital voltmeters can be very inaccurate if they are measuring something that matches the impedance of the meter (loading effects of the voltmeter), but that is another story.


What could be the tendencies for the voltmeter if the voltages to be measured exceed the range?

You'd potentially damage the meter. Whether you do or not is immaterial; if the meter cannot measure the range of voltages you are expecting, it will not give accurate readings over that voltage range, thus you should not use it. Buy a different meter that will measure over that voltage range, or use a voltage divider circuit to get a lower voltage at a certain ratio of what is actually in the circuit (this may be difficult to do, or very simple depending on the circuit tested - the key is you do not want to load the circuit with the voltage divider network).


How may millili ters in a kilometer?

The two units measure different types of things and can't be directly compared or converted.


Will dc voltmeter measure ac voltage?

Yes, if you provide a rectifier to convert the AC into DC. This is how early AC voltmeters worked. They rectified the AC into DC, and the DC voltmeter measured something related to the peak voltage. In order to calibrate, you then considered that RMS voltage is peak voltage divided by the square root of 2. The problem with that approach is that it only works for sinusoidal AC. If the AC is some other shape, such as square or triangular, then the calibration does not work correctly. Modern AC voltmeters measure true RMS using signal processing techniques. If you attempt to measure AC with a DC voltmeter without a rectifier, it may or may not work, depending on the design of the meter. An ordinary VOM style meter would read zero, because the average voltage of an AC waveform is zero.


Does a diameter of 10 ft equal 10 square feet?

No. A diameter is a length, which may be measured in feet. Square feet are used to measure areas. You cannot convert directly from linear measures to square measures.