Please choose the correct ending to complete the given sentence: Education and Communications: [header] How to measure resistance [title] Choose the item whose resistance you wish to measure. [step] For the most accurate measurement, test the resistance of a component individually. Remove the component from the circuit or test it before you install it.

Ending1: [substeps] An electric component is the outside of a circuit, not inside. Different parts of a circuit have different resistance ratios. Ending2: [substeps] Electrodes are plastic, rubber and metal washers with the control appliance the same color and shape as the non-electric component. [title] Find the number (or number of volts, kilobytes, bpa, or bmp) that corresponds to the current of the conducting surface of the object. Ending3: Testing the component while still in the circuit can cause inaccurate readings from other components. [substeps] If you are testing a circuit or even just removing a component, be sure that all power to the circuit is turned off before proceeding. Ending4: [substeps] If you do not have it in a specific place, you can label the component with the number of volts charged into it. Measure out all the components that you want into your resistance testing kit.

Answer format: ending1/ending2/ending3/ending4