Principles Of Electric Circuits
10th Edition
ISBN: 9780134879482
Author: Floyd, Thomas L.
Publisher: Pearson,
expand_more
expand_more
format_list_bulleted
Concept explainers
Textbook Question
Chapter 3, Problem 38P
A certain electrical device has an unknown resistance. You have available a 12 V battery and an ammeter. How would you determine the value of the unknown resistance? Draw the necessary circuit connections.
Expert Solution & Answer
Want to see the full answer?
Check out a sample textbook solutionStudents have asked these similar questions
How do we calculate the total resistance?
State the characteristics of voltage and current in a series circuit connection of resistors.
State the characteristics of voltage and current in a parallel circuit connection of resistors.
please explain it properly.
A resistor has a resistance of 20 ohms at 30 degrees Celsius and 32 ohms at 90 degrees Celsius. Find its resistance at 125 degrees Celsius. Determine also the temperature coefficient at 100 degrees Celsius.
(Please Show Complete solution and write properly)
(Round off the final answer to the 4th decimal if possible and box the final answer)
Chapter 3 Solutions
Principles Of Electric Circuits
Ch. 3 - If the current drops to 10 mA under the same...Ch. 3 - If the sense resistor develops 0.8 V across it,...Ch. 3 - Calculate the current in Figure 3-71 if R is...Ch. 3 - What is the current in mA produced by 1 kV across...Ch. 3 - How much current is there through a 6.8 M resistor...Ch. 3 - In Figure 3-10, how much voltage is required to...Ch. 3 - lf there are 3.2 A through a 47 resistor, what is...Ch. 3 - If there are 450 A through a 3.9 M resistor, what...Ch. 3 - In the circuit of Figure 3-13, how much resistance...Ch. 3 - If one of the grid wires opens, the current drops...
Ch. 3 - If the resistor is changed in Figure 3-14 so that...Ch. 3 - If the total resistance of a circuit increases and...Ch. 3 - Ohms law for finding resistance is R = I/V.Ch. 3 - When milliamps and kilohms are multiplied...Ch. 3 - If a 10 k resistor is connected to a 10 V source,...Ch. 3 - The current in a fixed resistor is directly...Ch. 3 - Ohms law for finding current is I = V/R.Ch. 3 - When microamps and megohms are multiplied, the...Ch. 3 - When voltage is constant, current is inversely...Ch. 3 - Ohms law for finding voltage is V = I/R.Ch. 3 - When I is plotted as a function of V for a fixed...Ch. 3 - Ohms law states that 1. current equals voltage...Ch. 3 - When the voltage across a resistor is doubled, the...Ch. 3 - When 10 V are applied across a 20 resistor, the...Ch. 3 - When there are 10 mA of current through 1.0 k...Ch. 3 - If 20 V are applied across a resistor and there...Ch. 3 - A current of 250 A through a 4.7 k resistor...Ch. 3 - A resistance of 2.2 M is connected across a 1 kV...Ch. 3 - How much resistance is required to limit the...Ch. 3 - An electric heater draws 2.5 A from a 110 V...Ch. 3 - The current through a flashlight bulb is 20 mA and...Ch. 3 - If the current through a fixed resistor goes from...Ch. 3 - If the voltage across a fixed resistor goes from...Ch. 3 - A variable resistor has 5 V across it. If you...Ch. 3 - If the voltage across a resistor increases from 5...Ch. 3 - If larger voltages are applied and results are...Ch. 3 - If the IV curve for a larger value resistor is...Ch. 3 - If the voltmeter reading changes to 175 V, the...Ch. 3 - If is changed to a larger value and the voltmeter...Ch. 3 - If the resistor is removed from the circuit...Ch. 3 - If the resistor is removed from the circuit...Ch. 3 - If the rheostat is adjusted to increase the...Ch. 3 - If the rheostat is adjusted to increase the...Ch. 3 - If the fuse opens, the voltage across the heating...Ch. 3 - If the source voltage increases, the voltage...Ch. 3 - If the fuse is changed to one with a higher...Ch. 3 - If the lamp burns out (opens), the current a....Ch. 3 - If the lamp burns out, the voltage across it a....Ch. 3 - In a circuit consisting of a voltage source and a...Ch. 3 - State the formula used to find I when the values...Ch. 3 - State the formula used to find V when the values...Ch. 3 - State the formula used to find R when the values...Ch. 3 - A variable voltage source is connected to the...Ch. 3 - In a certain circuit, I = 5 mA when V = 1 V....Ch. 3 - Figure 322 is a graph of current versus voltage...Ch. 3 - Plot the currentvoltage relationship for a...Ch. 3 - Plot the currentvoltage relationship for a...Ch. 3 - Determine the current in each circuit in Figure...Ch. 3 - You are measuring the current in a circuit that is...Ch. 3 - (a) If you wish to increase the amount of current...Ch. 3 - Plot a graph of current versus voltage for voltage...Ch. 3 - Does the graph in Problem 13 indicate a linear...Ch. 3 - Figure 3-24 shows an IV curve for a certain light...Ch. 3 - For the bulb graphed in Figure 3-24, what is the...Ch. 3 - Determine the current in each case: a. V = 5 V, R...Ch. 3 - Determine the current in each case: a. V = 9 V, R...Ch. 3 - Assume 200 mV is across a 330 m current sensing...Ch. 3 - A certain resistor has the following color code:...Ch. 3 - A 4-band resistor is connected across the...Ch. 3 - A 5-band resistor is connected across a 12 V...Ch. 3 - If the voltage in Problem 22 is doubled, will a...Ch. 3 - A certain rear window defroster has a resistance...Ch. 3 - If the voltage of the battery in problem 24 drops...Ch. 3 - The potentiometer connected as a rheostat in...Ch. 3 - A 270 current-limiting resistor has a voltage of...Ch. 3 - A small solar cell is connected to a 27 k...Ch. 3 - Calculate the voltage for each value of I and R:...Ch. 3 - Calculate the voltage for each value of I and R:...Ch. 3 - Three amperes of current are measured through a 27...Ch. 3 - Assign a voltage value to each source in the...Ch. 3 - A 6 V source is connected to a 100 resistor by...Ch. 3 - Calculate the resistance of a rheostat for each...Ch. 3 - Calculate the resistance of a rheostat for each...Ch. 3 - Six volts is applied across a resistor. A current...Ch. 3 - The filament of a lamp in the circuit of Figure...Ch. 3 - A certain electrical device has an unknown...Ch. 3 - By varying the rheostat (variable resistor) in the...Ch. 3 - In the light circuit of Figure 329, identify the...Ch. 3 - Assume you have a 32-light string and one of the...
Knowledge Booster
Learn more about
Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, electrical-engineering and related others by exploring similar questions and additional content below.Similar questions
- What are the relationships of resistance, voltage and current, and the distribution of voltages and currents in each resistor for the different type of circuits.arrow_forward3. A current of 0.4 ? is flowing out of a battery connected to a circuit.a. If the battery is switched on for 25 ???????, calculate the charge that flowed.b. The battery is 9 ?, calculate the energy transferred c. What is the rated power of the circuit?d. For the following circuit calculate the equivalent resistance.arrow_forward7. How does the multimeter/voltmeter have to connect to the battery in order to provide an indication? What does this tell us about multimeter/voltmeter use and the nature of voltage? 8. Is there such a thing as voltage "at" a single point? 9. What would you say about a piece of wire if the ohmmeter needle didn't move at all when the probes were connected to opposite ends?arrow_forward
- (ii) (iii) (iv) Explain how you would take a voltage measurement with a multimeter at a given point in a circuit and across a device, why would it be important to ensure it was not left on an ammeter setting. How would you measure the current through a resistor with a multimeter. In each case what would be the input resistance of the multimeter?arrow_forwardwhat is the equivalent resistance?arrow_forward1. What will this voltmeter register when connected to a battery as shown (assume a battery voltage of 6 volts)? Explain your answer. va OA Con Follow-up question: what does this tell you about the nature of voltage, and how it is measured?arrow_forward
- An ohmmeter is used for measuring the resistance of a circuit between its two terminals. What would be the reading of such an instrument used for the circuit at point (a) AB (b) AC and (c) BC? All resistances are in ohm.arrow_forwardA. Find the value of the following color-coded resistor and its tolerance. Compute also the minimum and maximum values. Color Coded Coded Value Maximum Value Minimum Value 1. gray-red-red-gold 2. orange-black-red-gold 3. yellow-violet-red-gold 4.brown-green-blue-gold 5.green-brown-yellow-silver B.what is the conclusion?arrow_forwardCalculate the values of different current for the circuit shown below. What is the total circuit conductance and resistance?arrow_forward
- What are the differences between load resistance in a circuit and internal resistance in a battery? Explain.arrow_forwardWhich of the following statements best explains why an ammeter is always connected in series in an electrical circuit? It allows current to flow through it. B The ammeter is a very accurate current measuring instrument. C The pd across the ammeter is usually negligible. D The ammeter is extremely sensitive to changes in temperature. 31. Aarrow_forwardThe Wheatstone bridge has been in use longer than almost any other electrical measuring instrument. Select one: a. Accuracy of 0.01% is quite common with Wheatstone as opposed to 3% to 5% error with the ordinary ohmmeters for resistance measurement. b. Accuracy of 1% is quite common with Wheatstone as opposed to 3% to 5% error with the ordinary ohmmeters for resistance measurement. C. Accuracy of 0.1% is quite common with Wheatstone as opposed to 3% to 5% error with the ordinary ohmmeters for resistance measurement.. d. Accuracy of 0.1% is quite common with Wheatstone as opposed to 10% to 15% error with the ordinary ohmmeters for resistance measurement.arrow_forward
arrow_back_ios
SEE MORE QUESTIONS
arrow_forward_ios
Recommended textbooks for you
- Delmar's Standard Textbook Of ElectricityElectrical EngineeringISBN:9781337900348Author:Stephen L. HermanPublisher:Cengage LearningElectricity for Refrigeration, Heating, and Air C...Mechanical EngineeringISBN:9781337399128Author:Russell E. SmithPublisher:Cengage Learning
Delmar's Standard Textbook Of Electricity
Electrical Engineering
ISBN:9781337900348
Author:Stephen L. Herman
Publisher:Cengage Learning
Electricity for Refrigeration, Heating, and Air C...
Mechanical Engineering
ISBN:9781337399128
Author:Russell E. Smith
Publisher:Cengage Learning
What is an electric furnace and how does it work?; Author: Fire & Ice Heating and Air Conditioning Inc;https://www.youtube.com/watch?v=wjAWecPGi0M;License: Standard Youtube License