Mega = million
Megaohm = 1000000 Ohms
Because the meter is actually measuring the current through the resistor, and the two quantities ... current and resistance ... are inversely proportional. So when the meter measures more current, it has to read less resistance, whereas higher resistance will result in less current. So the numbers for resistance have to be printed "backwards" on the meter scale.
It depends on the resistance of the galvanometer and its full scale current. A 100 ohm meter reading 1 milliampere would require 0.1 volts to reach full scale, so it would require about 0.1 ohms in parallel to become a 1 ampere ammeter.
Always start with the highest scale, than work your way down until you get a midscale reading. If you start with a low scale, you will overrange the meter, which can damage it in severe cases (especially the older analog meter movements).
I think you mean the meter is rated at 1K ohms per volt. It means that with a series resistance designed to give FSD at any required voltage, the total series resistance must be 1000 ohms per volt (100K ohms for 100volts) . This is because 1K ohms per volt is just another way of saying that the full scale reading occurs at 1mA current. In that case a full scale deflection for 100 volts applied, 1mA is obtained with a total resistance (meter + added resistance) of 100 kOhms which is your loading resistance.
Practically all analog meters are a coil movement of 50micro amps or so to measure a 50amps then becomes a problem the meter will destroy itself. However is a very small shunt of resistance if placed in the path of the 50 ampere flow then a small voltage drop will develop a Mv. THAT A METER CAN SAFELY READ. this voltage drop can be calibrated to show a 50 ampere full meter deflection. Therefore read Mv to get amps. It should be noted that since the small resistance is in series with the circuit there will be an error caused by the shunt resistance. Bottom line it should be small in value as possible to reduce this error for accuracy sake. Digital meter will function the same way as an analog meter meaning shunt mv reading for full scale readout.
The easiest way is to put a high resistance in series with the meter.You must know the input resistance of the meter. This is specified in the owner manual.Some meters are specified as having a certain input resistance.If a meter has a 1 Megohm input resistance, you can scale it up by a factor of ten by putting a 9 Megohm resistor in series with one of the probes.Some meters are specified in "ohms per volt".The Ohms/V rating can be different on different scales. If a meter is specified on the 600 volt scale as having "20,000 Ohms per Volt", then this means that the meter's resistance is 20,000 * 600, = 12,000,000 Ohms. 12 Megohms.To expand the meter's 600V scale to 10X the rating (6,000 volts), you would put a 108 megohm resistance in series with the probe. This resistance could be made up of ten 10 Megohm resistors, a 7.5 megohm resistor, and a 470 Ohm resistor. Even though that is only 107.97 megohms, the error is less than 1%.To expand the scale to 2X (1,200V) you would put a 12 megohm resistance in series with the probe.High voltage low power resistor strings can be put inside plastic, glass, or ceramic pipes. Consult the appropriate industry publications for recommendations.warning:Be careful when measuring high voltages. Never work alone.Most simple resistors are not rated for high voltage over 200-500 volts per each resistor and will arc or burn. Injury or death may result.I prefer to hook the "hot" end of the probe to the high voltage test point and let it hang there, and not to hold it by hand. Then I energize the equipment and take the readings. After I am done, I discharge the high voltage and safely remove the probe from the equipment.Poorly made or defective probes have killed people.
a multimeter probably has a Ohm meter as well. If yes, use it and make sure you have the correct scale adjusted. If there is no Ohm meter you should calculate the resistance using Ohms Law. So if you use your multimeter as an Amp meter (in series with the unknown resistor) and you apply a know voltage across you should be able to calculate the resistance by dividing the voltage you applied by the current you meassured (R=v/I) ANSWER: 1 make sure ther is no external power connected 2 short the leads together and adjust for zero reading on the meter. This step is necessary to eliminate the internal battery drifting with time. Unlike voltage and amps reading the scaling of the meter is not important to begin with since a peg meter or a overflow will not destroy the meter immediately but do change the scale to get maximum deflection or digital display.That it
Because the meter is actually measuring the current through the resistor, and the two quantities ... current and resistance ... are inversely proportional. So when the meter measures more current, it has to read less resistance, whereas higher resistance will result in less current. So the numbers for resistance have to be printed "backwards" on the meter scale.
How can you measure water purity ?
we can measure the distance by meter scale
newton meter
It depends on the resistance of the galvanometer and its full scale current. A 100 ohm meter reading 1 milliampere would require 0.1 volts to reach full scale, so it would require about 0.1 ohms in parallel to become a 1 ampere ammeter.
ohms law babe voltage,current & resistance
You can measure directly with an Ohm Meter, often combined with a Volt Meter. Or you can measure the voltage across the resistance and the current to calculate resistance as Current divided by Voltage.
Any of the multi testers that I have come across are not frequency sensitive. I use a Fluke process meter and it can be used to measure frequency if that scale is selected. Voltage is voltage, amperage is amperage and resistance is resistance regardless of what he frequency is.
Always start with the highest scale, than work your way down until you get a midscale reading. If you start with a low scale, you will overrange the meter, which can damage it in severe cases (especially the older analog meter movements).
Take a sound pressure level meter (SPL meter). Try to measure the sound pressure p in pascals or in decibels, referred to the threshold of hearing with 20 micropascals.