Calculate the currents through each resistor in the current division circuit in Figure 4.2 below for the given range of R in Table 4.1 and record the results under the Calculated column. Take note that the direction of the currents is arbitrarily given. 752 i1 ... 5V 1502 R Figure 4.2: Sum of Currents at a Node Calculated Measured R İz + iz (mA) i, (mA) i2 (mA) i3 (mA) iz + i3 (mA) (mA) (mA) (mA) 510 0 1.0 kQ 2.0 kO 3.0 kΩ 4.3 kQ 5.1 ko

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Wheatstone Bridge Method

A Wheatstone bridge is a circuit used to measure unknown resistance by measuring the ratios of the two branches of the circuit such that each branch has two resistance and out of four resistance one is unknown. The two branches are joined in between with the help of galvanometer which is used to determine the direction of the current. The main advantage of this circuit is that it can provide the most accurate measurement (different from a simple voltage separator).