Find VA and VB in terms of R1, R2 For the following circuit, find expressions fo

Question

Find VA and VB in terms of R1, R2

For the following circuit, find expressions for v_A and v_B in terms of the voltage source, and resistor values. [Watch the polarities of the voltages, and place your meters carefully!] At the beginning of the lab exam, you'll receive 2 resistors. Determine their nominal values, then measure their values with the multi-meter. Below, you'll calculate predicted values for v_A and v_B. Let V_s = 6 V DC (Be careful making connections to the Voltage Source to accomplish this input, with grounding either side of the source!)

Explanation / Answer

current in the circuit=Vs/(R1+R2)

then voltage across R1=Va=current*R1=Vs*R1/(R1+R2)

voltage across R2=-Vb=current*R2=Vs*R2/(R1+R2)

then Vb=-Vs*R2/(R1+R2)

final answer:

Va=Vs*R1/(R1+R2)

Vb=-Vs*R2/(R1+R2)

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