For each setting, the resistance of each resistor is precisely known. With switchesK_{1}K1​andK_{2}K2​closed, these resistors are varied until the current in the galvanometerGGis zero; the bridge is then said to be balanced. (a) Show that under this condition the unknown resistance is given byX=M P / NX=MP/N

7.- The Wheatstone Bridge. The circuit shown in the figure, called a Wheatstone bridge, is used to determine the value of an unknown resistor XX by comparison with three resistors M, NM,N, and PP whose resistances can be varied. For each setting, the resistance of each resistor is precisely known. With switches K_{1}K1​ and K_{2}K2​ closed, these resistors are varied until the current in the galvanometer GG is zero; the bridge is then said to be balanced. (a) Show that under this condition the unknown resistance is given by X=M P / NX=MP/N. (This method permits very high precision in comparing resistors.) (b) If the galvanometer GG
shows zero deflection when N=1850.0 Omega, M=150.00 OmegaN=1850.0Ω,M=150.00Ω and P=133.48 OmegaP=133.48Ω what is the unknown resistance XX if E=120E=120 V?

The post For each setting, the resistance of each resistor is precisely known. With switches K_{1}K1​ and K_{2}K2​ closed, these resistors are varied until the current in the galvanometer GG is zero; the bridge is then said to be balanced. (a) Show that under this condition the unknown resistance is given by X=M P / NX=MP/N appeared first on nursing assignment tutor.

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