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An Ohm Meter.
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∙ 14y ago
Wiki User
∙ 11y agowheatstone bridge method
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Do you unplug before measuring resistance?
Yes. Measuring resistance involves imposing a small current through a device and measuring the voltage drop. If there were any other source of voltage, the reading would be in error. You could also damage the ohmmeter if there were an external voltage source. You should also take the device out of circuit before measuring it, so as to not bias the results by the resistance of other devices in the circuit. It all depends on the situation, for which you are responsible for evaluating before you start.
How do you calculate contact resistance?
Resistance is resistance , no matter if it is contact resistance or any other resistance. And formula is R = V / I.
Why the resistance of a capacitor is infinite when measures with an ohmmeter?
The typical ohmmeter measures DC resistance by providing DC current and measuring the voltage drop accross the resistor. By definition, the 'ideal' capacitor is an open circuit to DC current and voltage. By definition, an open circuit has infinite resistance. Of course, real-world capacitors are not ideal. They have a very high parallel leakage resistance and a very small series resistance. And, different meters can measure different ranges of resistance. So, you may not get an infinite/overload measurement on some capacitors with some meters. You may get a very high resistance instead. If so, you are not really measuring the resistance of the 'capacitor', but rather that of the imperfections in the component manufactured to be a capacitor. ANSWER: The ohmmeter battery will charge the capacitor in 5 time RC after that it quirts there is no more current flow. Any body that claim to be able to check resistance of a capacitor i just a wannabe
If voltage equals resistance x current then?
Ohm's Law: Voltage equals Resistance times Current Given any two, you can figure out the other using simple algebra.
How do you access final methods from Outer Classes?
The final modifier has nothing to do with access. If your "outer" classes can see the method, they can access them just like any other methods.
Do you unplug before measuring resistance?
Yes. Measuring resistance involves imposing a small current through a device and measuring the voltage drop. If there were any other source of voltage, the reading would be in error. You could also damage the ohmmeter if there were an external voltage source. You should also take the device out of circuit before measuring it, so as to not bias the results by the resistance of other devices in the circuit. It all depends on the situation, for which you are responsible for evaluating before you start.
Where do you set the dial when you are measuring resistance on house current?
YOU DO NOT "measure resistance on house current".You never measure resistance of anything that has any path to any source ofpower ... not to a wall outlet, a battery, a windmill, a solar panel, etc. You onlymeasure resistance when all power is REMOVED from the circuit or componentyou're measuring. Then, the range you choose for the ohmmeter depends onthe component or circuit you're measuring, NOT on how it's powered when it'sturned on.
How do you calculate contact resistance?
Resistance is resistance , no matter if it is contact resistance or any other resistance. And formula is R = V / I.
What are the three methods to determine the value of a resistor?
Basically you can either read the resistance that is printed on the resistor (with a special color code, which you would have to learn), or you can use Ohm's Law, by measuring a voltage through the resistor and the corresponding current. I am not aware of any third method.
What methods do thermometers utilized in measuring temperature?
A thermometer can use any of several methods to register temperature. These include mercury; liquid-in-glass; electronic with digital display; infrared or tympanic; and disposable dot matrix
What can affect the size of an applied force?
Friction or any other resistance.
Why does voltmeter practically not consume any electric energy from the electric circuit?
The resistance used in a voltmeter is extremely high when measuring voltage, which is why the current is low (I = E/R).
Why do ammeter resistanse is very small?
An ammeter with a large resistance will affect the circuit that it is trying to measure. The ideal ammeter (or any measuring tool) should not affect what is being measured.
What does for shadowing mean?
shadowing in general is when two variables/methods or any other element has same name and any one of the both can shadow( in OOP case override) the behavior of the other one. garimashadowing in general is when two variables/methods or any other element has same name and any one of the both can shadow( in OOP case override) the behavior of the other one. garimashadowing in general is when two variables/methods or any other element has same name and any one of the both can shadow( in OOP case override) the behavior of other. garima
Passwords are common for form authentication. Can you think of any other methods of authentication?
name and other information
What is the input resistance of an ideal current-measuring DMM?
First of all, DMM stands for Digital Multimeter. The -multi implies the meter measures several different parameters, usually voltage, current, resistance, and sometimes other things such as frequency. The input characteristics of a DMM will be very different depending on the parameter selected. For current, the ideal meter would have zero input resistance. Since the ammeter is inserted in series with the circuit under test, any resistance will alter the measured current, introducing error in the measurement.
Two methods of measuring air consumption are cubic feet per minute and?
Any volume and time units can be used, however the SI unit for volume flow m3/s
