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Study guide. chloefallon08. Terms in this set (15) An ammeter is used to measure __________. What is the unit of measurement for resistance? Which of the following statements is not true about measuring the resistance of a component that is connected in a circuit? Current in a __________ circuit is divided among the branches of the circuit.
Sep 14, 2023 · 3. Turn on the multimeter and select the best testing range. The resistance of a component can range from ohms (1 ohm) to megaohms (1,000,000 ohms). In order to get an accurate reading of resistance you must set the multimeter to the proper range for your component.
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Figure 10.5.2 10.5. 2: (a) When an ammeter is used to measure the current through two resistors connected in series to a battery, a single ammeter is placed in series with the two resistors because the current is the same through the two resistors in series. (b) When two resistors are connected in parallel with a battery, three meters, or three ...
Aug 15, 2016 · Resistance; Voltage; Current; 1. Measuring resistance. Figure 2 shows the steps that should be followed when measuring resistance. Remember that resistance measurements are carried out without the power being applied to the component under test, and resistance values can vary by as much as 20% due to the tolerance of certain resistors.
Both types of instrument can measure not only resistance, but also current, voltage, and other parameters, so they can be used in a variety of situations. However, resistance measurement does not involve measuring the circuit’s resistance value itself. Instead, resistance is calculated by measuring the current and voltage applied to the circuit.
Ohmmeters. An ohmmeter is an instrument used to measure the resistance of a component or device. The operation of the ohmmeter is based on Ohm’s law. Traditional ohmmeters contained an internal voltage source (such as a battery) that would be connected across the component to be tested, producing a current through the component. A ...
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Such configurations are limited in accuracy, because the meters alter both the voltage applied to the resistor and the current that flows through it. Figure 3. Two methods for measuring resistance with standard meters. (a) Assuming a known voltage for the source, an ammeter measures current, and resistance is calculated as R = V/I.
