(Solved): The circuit in the figure is called the Wheatstone bridge. It is often time used to measure the ele ...

The circuit in the figure is called the Wheatstone bridge. It is often time used to measure the electrical resistance by balancing the two legs of the bridge circuit. It provides an extremely accurate measurement. A Wheatstone bridge is said to be balanced if there is zero current flowing through the "bridge", $R_5$, between the two legs. The circuit shown is not necessary balanced. The resistors in the Wheatstong bridge have of values of $R_1=250?,R_2=$ $220?,R_3=200?,R_4=120?$ and $R_5=85?$ The bridge is connected to a $12\mathrm{V}$ battery. Use the Falstad simulator to answer questions below. (Figure 1) What is the voltage at point B? Part I If you have to balance the bridge $\left(I_5=0\right)$ by changing the value of $R_3$. What value will that be? Part J Change the voltage of the battery to a different value. Does the voltage of the battery affect the balance of the bridge? What is the current through resistor ${\mathbf{R}}_{\mathbf{l}}$ ? Part F What is the current through resistor ${\mathbf{R}}_{\mathrm{S}}$ ? Part G What is the voltage at point A? What is the current through resistor $R_1$ ? Part C What is the current through resistor $R_2$ ? Part D What is the current through $R_3$ ?