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How can the basic d'arsonval meter movement be used to measure high-amplitude currents?
The basic d'arsonval meter movement be used to measure high-amplitude currents by placing a very low resistance across it.
For instance... Let's say you want a 100 Amp meter. You have a 50 microamp meter with an impedance of 250 ohms. That means you need 99.99995 amps in parallel with 50 microamps across 250 ohms.
(50x10-6)(250) = (99.99995)(x)
X = 0.000125 ohms
Note: At 100 amperes, that resistor is going to dissipate only 1.25 watts, but you are going to need to use fairly substantial cabling, because 0.000125 ohms is a very small value compared to the impedance of even ordinary pieces of wire.
What else can I help you with?
What are the basic test instruments in electricity?
A "multimeter" to test resistances, voltages, amperages. An external "clamp" meter to measure high ac currents. A "mega" meter to test insulation.
How can you convert galvanometer into ammeter?
Since Galvanometer is a very sensitive instrument therefore it can't measure heavy currents. In order to convert a Galvanometer into an Ammeter, a very low resistance known as "shunt" resistance is connected in parallel to Galvanometer. Value of shunt is so adjusted that most of the current passes through the shunt. In this way a Galvanometer is converted into Ammeter and can measure heavy currents without fully deflected.
How do you measure the current through a circuit without intercepting the supply?
Add an ammeter in parralel with the circuit. An ammeter in parallel with a circuit to be measured will not measure any current. In fact, placing an ammeter in parallel will cause a short. The ammeter must be placed in series with the circuit to be measured. It should be noted that this technique only allows for small magnitudes of current to be measured. One should not try to measure more than 10 amps using this method. However, this is not the goal of the question asked. I am not 100% sure what "intercepting the supply" means but I think the person asking the question means without breaking the circuit? In this case one could use a clamp on ammeter. There are several varieties that can measure low currents and there are those that can measure 100s of amps.
What does an electronic scale measure?
to measure electrical enegy
How do you increase current capacity of an ammeter?
In measuring high AC currents a current transformer with a suitable rating say 100/5 or 1000/5 are used. The secondary current is usually 5 amps when the fulload current of 100 or 1000 as the case may be is flowing in the mains. It is the univerasl practice to use CT's for measurement of AC currents. In DC circuits the transformer method will not work, so to increase the current that you can measure you can allow a known amount of current to bypass the ammeter and recalibrate the ammeter. In other words, put a shunt in parallel with the ammeter.
What do you measure currents in?
Currents are measured in amps being I
What are the uses of ammeter?
The uses of an Ammeter is to measure the currents in which circulate the dimension of a 360 degree atom which is formed by the spatial movement of the electron in proportion to the many millions that there are.
What instrument measures small currents?
A galvanometer is used to measure small currents.
What is the device used to measure electrical currents?
An ammeter is the device used to measure electrical currents. It is typically connected in series in a circuit to measure the flow of current passing through it.
Flow meters are not used to measure bottom currents why?
Bottom currents move too slow.
What does a swallow float measure?
it checks ocean currents
What is normally used to measure weak electric currents?
An ammeter is typically used to measure weak electric currents. It is a device that is connected in series with the circuit to measure the current flowing through it accurately. Specialized instruments like a nanoammeter or picoammeter may be used for extremely weak currents.
How are ocean currents measured?
Ocean currents can be measured using instruments such as current meters, Acoustic Doppler Current Profilers (ADCPs), and drifting buoys. These devices can provide information on the direction, speed, and depth of ocean currents. Remote sensing technologies, such as satellites, can also be used to measure surface currents over broader areas.
What method is used to measure the movement of oceanic plates?
Satellites are used to measure the movement of plate by radiation.
How do you measure movement of air by unit?
As far as I know, there is no measure of movement of air, but if you really are persistent, you can use balloons.
Does a galvanometer measure small objects?
No, a galvanometer is a device used to detect and measure small electric currents. It is not typically used to measure small objects.
What is used to measure the Richter scale?
A seismograph is used to measure ground movement or vibrations on the Richter scale.
