Description: Wheatstone bridge (also known as Wheatstone bridge) is an instrument that can accurately measure resistance. Figure 3-13 is a common Wheatstone bridge. Resistors R1, R2, R3, R4 called the four-arm bridge, G for the galvanometer, to check whether it is in the branch current. When no current passes through G, the said bridge balance. Balance, the four arm resistance to a simple relationship between the resistance can be measured by this relationship.
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Wheatstone Bridge.ppt