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Why must a multimeter only be use to test the resistance of a deionized circuit or component?
Wiki User
∙ 9y ago
It isn't true, a multimeter can be used for all kinds of other measurements as well.
Wiki User
∙ 9y ago
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Placing a voltmeter into a circuit will raise the circuit resistance?
Usually a volt meter is placed across a component to measure the voltage drop across that component. Doing this places the volt meter resistance in parallel with that component's resistance, which will always lower the total resistance. Since the volt meter resistance is usually very large relative to the resistance of the element being measured, the total resistance does not change significantly. The formula for total resistance of two parallel elements is: Rtot = (R1*R2)/(R1+R2), as R1 (the volt meter) >> R2, Rtot ~= (R1*R2) / (R1) = R2 If a volt meter is placed into a circuit instead of around an element of that circuit, it will raise the resistance of the circuit, load the circuit with, and interrupt "normal" operation of the circuit (normal operation = how things would be without the meter in place). More importantly, the volt meter would then be measuring the voltage developped across itself (instead of an element of the circuit), which is not the point of this tool / this would be a misapplication of a volt meter.
If you are using a multimeter as an ohmmeter and you get a reading of maximum resistance what does that tell you about the circuit you are measuring?
Did you mean "maximum RESISTANCE" or "maximum VALUE"? If the former, then, you have a ZERO reading, meaning there is high resistance, and no electrical connectivity. If the latter, you have a ONE (or 100%) reading, meaning there is NO resistance, or absolute electrical connectivity. As an analogy, if you turn on a plugged-in, working, lamp, then it has NO resistance, such that power flows easily through the cord; if it didn't turn on, then there IS resistance, such that no power flows, possibly due to broken wire, bad switch, burned-out bulb, or blown fuse.
What is the type of circuit that will not work when a component burns out?
A seríes circuit will not work when a component burns out, because then no current can pass around the circuit.
What is the purpose of a fuse in a multimeter?
The purpose of a fuse in a multimeter is to protect the instrument and the user from excessive current. If too much current flows through the multimeter, the fuse blows, breaking the circuit and preventing damage to the multimeter or potential harm to the user. This helps ensure the safe and accurate operation of the multimeter.
In what part of the circuit do the electric charges releases most of their energy?
The component with the highest resistance in a series circuit will have, or "drop" the most voltage across it. All of the components in a series circuit will have the same amount of current flowing through them but not the same voltage drops if the resistances are different. More resistance more voltage across it, less resistance, less voltage across it.
Why could the total resistance of the circuit vary when measuring resistance using a multimeter?
Residence of one component varies overtime and from component to component.
What tool can be used to test voltage resistance and amperage in a circuit?
A multimeter.
Principle of multimeter?
Based on the principle of the D'Arsonval galvanometer, the main function of a multimeter is measuring a circuit's voltage, current, and resistance.
What specialty tool can be used to test voltage resistance and amperage in a circuit?
A multimeter.
When you connect a multimeter across an open component what is the reading?
That will depend on the setting of the meter switch and the circuit connected to the component (if there is one).
What purpose might the multimeter serve in maintaining and troobleshooting a computer network?
With the multimeter you can measure the voltage on parts of the circuit board. You can also measure the resistance of resistors and make sure there are no short circuits in the circuit.
How is the total resistance in a series circuit is determined?
The total resistance in a series circuit is determined by adding (summing) the individual resistances of each component in the circuit.
Why you use digital multimeter?
They're used for a number of purposes... testing amperage output, testing voltage output, testing circuit resistance to identify shorts or breaks in the circuit... the digital multimeters are preferred, especially in testing electronics for resistance, and they're less liable to burn out a circuit than an analog multimeter would be.
How do you find shorts and opens in an electrical circuit in multimeter?
An open circuit essentially has an infinite resistance. It is shown on digital multimeter as OL. (Open Line) A short circuit should read zero, or nearly zero, depending on the accuracy of the meter.
Will a circuit component with a high resistance will have a low electric current?
Yes
Can an airbag be probed with a multimeter to measure resistance and continuity safely?
Never probe airbag wiring with a power probe or multi-meter unless you have isolated the circuit by disconnecting both the airbag module and airbag component. As long as you have disconnected these you will be fine.
What is resistance reading?
A measurement of opposition to electric current flow in a component or circuit.
