Physics Laboratory Manual
4th Edition
ISBN: 9781133950639
Author: David Loyd
Publisher: Cengage Learning
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Textbook Question
Chapter 39, Problem 3PLA
A resistor has a current of 3.75 A when its voltage is 6.75 V. What is the resistance of the resistor? What power does it dissipate? Show your work.
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What is the equivalent resistance of a Red-Green-Brown resistor in series with a parallel combination of Brown-Green-Red and Orange-Black-Red resistors? Show your work.
A wire of length 10.0 m has a resistance of 2.75 ohm. What is the resistance of a piece ofthat same wire whose length is 25.0 m? Show your work.
9 V
B. The circuit at right is made from an ideal battery
connected to 4 ideal resistors as shown.
i.
What is the total resistance of this circuit?
Show your work.
R4= 352
R1 = 152
R3 = 452
ii.
Find the current through each of the 4
resistors. Show your work.
R2= 752
iii.
Rank the potential difference across the 4 resistors from greatest to least. Explain
your reasoning.
iv.
If resistor R3 is cut out of the circuit, without replacing it with anything, will the
current through resistor R2 increase, decrease, or stay the same? Explain your answer or
show your work.
Chapter 39 Solutions
Physics Laboratory Manual
Ch. 39 - Prob. 1PLACh. 39 - What is the constant ratio between electrical...Ch. 39 - A resistor has a current of 3.75 A when its...Ch. 39 - A resistor has a resistance of 1.50 and a voltage...Ch. 39 - If the resistor in Question 4 is immersed in...Ch. 39 - A resistor has a voltage of 6.65 V and a current...
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- Show your work.arrow_forwardThe resistivity of unknown metal is 1.72 x 10 -8 -m. A metal wire is 15.0 m long, and thewire diameter is 0.0500 cm. What is the resistance of the wire? Show your work.arrow_forwardAnswer the following questions and show your work. 1. Consider the following set of light bulbs. Assume that all the light bulbs are identical. (all R €84 a. Which group of light bulbs emits more light? b. If the light bulb in group 2 suddenly burns out, what happens to the light bulbs in group 1? c. What happens to the circuit seen if the circuit is broken between the two light bulbs in group 1? 2. Determine the equivalent resistance between A and B the figure below. FREZZLESSand R=30 www wwwwww R-40 3. Consider the circuit drawn below. Find the values of each of the currents. R=40 L R=10 Son 380 J00 8 الشان 4047044S Parrow_forward
- 1 3 5 6. Show your work to receive full credit. 1. The load across a 12-V battery consists of a series combination of three resistances R, R,, and R,. R, is 210 W, R, is 350 W, and R, is 120 W. Draw the circuit. a. Find the equivalent resistance of the circuit. b. Find the current in the circuit. c. Find the potential difference across R,- Sign !!!arrow_forwardA step-down transformer connected to a 120 V ac line is used to supply a 15 V external hard drive. A. What are the turns in the secondary coil, if the primary coil has 2000 turns? Show your work. B. The power in the primary coil is less than, equal to, greater than the power in the secondary coil. (Select one.)arrow_forward1. What is the total resistance of a circuit with four resistors of 30 each in a series? Show your work... 2. What is the total resistance of resistors 5N, 9N, 3N, 6N, 102 in a series? Show your work... 3. What is the total resistance of two lightbulbs in a series that have a resistance of 50 and 100? Show your work...arrow_forward
- Directions: Read and analyze the following problems, consider the two figures at the next page. Answer them properly and show your ENCODED SOLUTION. 1. For figure A: Using Ohms Law, calculate the equivalent series resistance, the series current, voltage drop and power for each resistor in the following resistors in series circuit. 2. For figure B. Find the total resistance, RT of the following resistors connected in a parallel network.arrow_forwardFind the resistance of the whole circuit given that each resistor has a resistance of 1.0 ohms. Show your work.arrow_forward12 V 18 V R2 0.4 2 R3 In this circuit there is a current of 1A flowing to the right through resistor R1. Find the resistance of R1. Show your work.arrow_forward
- show all the formulas you used PLEASE it’s really important for me that you show your work and formulas you used to resolve the problem.arrow_forwardFor the circuit below, where each resistor is 100Ω, what is the total resistance of the circuit? If thebattery is 9V, what is the current supplied by the battery? Show your work and reasoning. [Redraw the circuit as necessary. Refer to the labels in the diagram for all calculations.]arrow_forwardUsing three resistors (30 Ω, 60 Ω, and 120 Ω), two batteries (variable voltage), and some lightbulbs... A) Calculate the equivalent resistance you would get if you connected all three resistors (values above) in series. Show your work. Series Req = ________________ [Ω] (show calculations) B) Repeat the previous step for the case where all three are connected in parallel. Parallel Req = ________________ [Ω] (show calculations)arrow_forward
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