For the circuit of Figure \PageIndex1 determine the circulating current if the supply is 6 volts and the resistor is 10 kΩ. Determine the voltage across R2 in Figure \(\PageIndex{8...For the circuit of Figure \PageIndex1 determine the circulating current if the supply is 6 volts and the resistor is 10 kΩ. Determine the voltage across R2 in Figure \PageIndex8 if the source is 9 volts, the Zener is 6.8 volts, R1 = 5.1 k and R2 = 33 k. Determine the voltage across R2 in Figure \PageIndex8 if the source is 9 volts, the Zener is 5.6 volts, R1 = 5.1 k and R2 = 3.9 k.