Engineering Β· Unit 2 Β· Emerging processes, machinery and automation Β· Emerging processes, machinery and automation
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A robotics team is designing a temperature sensor circuit for an automated greenhouse monitoring system. The circuit uses two resistors in series: a fixed resistor and a thermistor. Refer to the circuit data below. Calculate the total resistance of the series circuit when the thermistor is at 25 Β°C. Show your working and express your answer in ohms (Ξ©).
A robotic welding arm is powered by a control circuit containing two resistors connected in series. The first resistor has a resistance of 180 Ξ© and the second resistor has a resistance of 270 Ξ©. The circuit is connected to a 12 V power supply. (a) Calculate the total resistance in the circuit. (b) Calculate the current flowing through the circuit.