Intermittent windshield wipers are driven by an RC circuit. Once the voltage across the capacitorreaches 10 V, the wiper motor is energized and discharges the capacitor (this is one complete sweep of the windshield wipers). The capacitor is 15 mF and the resistor is variable with a range of 0 to 2. kohms (controlled by the driver). A) If the driver sets the RC time constant to 0.5 ms, what is the variable resistor set to? B) What value should the driver set the variable resistance to, so that the wiper has a period of 20 seconds?

Intermittent windshield wipers are driven by an RC circuit. Once the voltage across the capacitorreaches 10 V, the wiper motor is energized and discharges the capacitor (this is one complete sweep of the windshield wipers). The capacitor is 15 mF and the resistor is variable with a range of 0 to 2. kohms (controlled by the driver). A) If the driver sets the RC time constant to 0.5 ms, what is the variable resistor set to? B) What value should the driver set the variable resistance to, so that the wiper has a period of 20 seconds?

Delmar's Standard Textbook Of Electricity

7th Edition

ISBN:9781337900348

Author:Stephen L. Herman

Publisher:Stephen L. Herman

Chapter21: Resistive-capacitive Series Circuits

Section: Chapter Questions

Problem 6RQ: A 15-F AC capacitor is connected in series with a 50 resistor. The capacitor has a voltage rating...

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