Build a circuit that contains a dc voltage source (v1 = 12v) connected to a resistor (r1 = 10 kω) and a potentiometer of resistance 10 kω. connect one outside terminal of the potentiometer to the resistor r1. connect the wiper (middle wire) and the other outside terminal of the potentiometer to the ground. a) using a voltage probe, measure the voltage across the potentiometer at position percent 50%. attach a screen shot of the circuit you built showing the voltage measurement. add your initials to the labels. b) repeat step (a) at position percent 0%. attach a screen shot of the circuit you built showing the voltage measurement. c) repeat step (a) at position percent 100%. attach a screen shot of the circuit you built showing the voltage measurement. d) comment on your results.