EBK PRINCIPLES OF ELECTRIC CIRCUITS
10th Edition
ISBN: 9780134880068
Author: Buchla
Publisher: VST
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Chapter 6, Problem 16RP
Sometimes a direct measurement of resistance is not practical. For example, tungsten filament bulbs get hot after turning them on, causing the resistance to increase. An ohmmeter cannot be used in an energized circuit, therefore it can only measure the cold resistance. Assume you want to know the equivalent hot resistance of the two headlight bulbs and the two taillight bulbs in a car. The two headlights normally operate on 12.6 V and draw 2.8 A each when they are on.
What is the total equivalent resistance of two headlights that each draw 3.15 A?
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Chapter 6 Solutions
EBK PRINCIPLES OF ELECTRIC CIRCUITS
Ch. 6 - Five resistors are positioned on a protoboard as...Ch. 6 - How would you connect all of the resistors in...Ch. 6 - If a third branch is added to the circuit in...Ch. 6 - Determine IT and I2 if a fourth branch is added to...Ch. 6 - How much current will an ammeter measure when it...Ch. 6 - When the brake lights are applied, the total...Ch. 6 - If a 33 resistor is connected in parallel in...Ch. 6 - Calculate the total resistance connected to the...Ch. 6 - If two of the speakers are removed, what is the...Ch. 6 - The basic circuit for a rear window defroster can...
Ch. 6 - If you need to obtain a total resistance of 130 ,...Ch. 6 - Sometimes a direct measurement of resistance is...Ch. 6 - Determine the current through RL in Figure 6-0...Ch. 6 - Figure 6-35 Determine the current through each...Ch. 6 - Determine the total amount of power in the...Ch. 6 - The amplifier in one channel of a stereo system as...Ch. 6 - In Figure 6-51, there is a total current of 31.09...Ch. 6 - Your ohmmeter indicates 9.6 k between pin 2 and...Ch. 6 - A 330 resistor, a 270 resistor, and a 68 ...Ch. 6 - Refer to Figure 6-83 If R7 opens, the resistance...Ch. 6 - Determine whether or not all the resistors in...Ch. 6 - The following currents are measured in the same...Ch. 6 - There is a total of 500 mA of current into five...Ch. 6 - In the circuit of Figure 6-65, determine the...Ch. 6 - The electrical circuit in a room has a ceiling...Ch. 6 - The following resistors are connected in parallel:...Ch. 6 - What is the total current in each circuit of...Ch. 6 - Find the values of the unspecified quantities...Ch. 6 - What is the current through each resistor in...Ch. 6 - Determine all of the resistor values in Figure...
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