3.0 V across the cable, and a current of 50 A in the circuit. Draw the circuit diagram, representing the battery as an ideal voltage source and internal resistance, and the cable and motor as resistances in series. Using the data provided, find the resistance of each part, the motor, the cable, and the battery, and decide if each is defective or not.
3.0 V across the cable, and a current of 50 A in the circuit. Draw the circuit diagram, representing the battery as an ideal voltage source and internal resistance, and the cable and motor as resistances in series. Using the data provided, find the resistance of each part, the motor, the cable, and the battery, and decide if each is defective or not.
Introductory Circuit Analysis (13th Edition)
13th Edition
ISBN:9780133923605
Author:Robert L. Boylestad
Publisher:Robert L. Boylestad
Chapter1: Introduction
Section: Chapter Questions
Problem 1P: Visit your local library (at school or home) and describe the extent to which it provides literature...
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Transcribed Image Text:3.0 V across the cable, and a current of 50 A in the circuit. Draw the circuit diagram, representing
the battery as an ideal voltage source and internal resistance, and the cable and motor as resistances
in series. Using the data provided, find the resistance of each part, the motor, the cable, and the
battery, and decide if each is defective or not.
Transcribed Image Text:You are a mechanic in a car-repair shop. You observe that the electric starting motor of a car is
turning too slowly. The motor is connected to a battery of emf equal to 12 V via a cable. Your job
is to decide which parts to replace: the motor, the cable, and/or the battery?
You consult the car's manual, which provides the proper operating specs for each of these parts:
the battery should have no more than 0.020 2 internal resistance, the motor should have no more
than 0.200 2 resistance, and the cable should have no more than 0.040 N resistance. If any of these
resistances is exceeded, it means that the part is defective.
You turn on the motor and measure the follov
voltages and currents: 11.4 V across the terminals
of the battery (note that this is not the emf, since it includes the effect of the internal resistance),
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