Wire D's cross-sectional area is 18 times the cross-sectional area of wire C. Each wire has the same length & resistivity. An end of wire C is connected to an end of wire D. The resulting wire has a resistance of 731 2. Determine the resistances of wires C & D. 2 S2 Rc= Ro=

Wire D's cross-sectional area is 18 times the cross-sectional area of wire C. Each wire has the same length & resistivity. An end of wire C is connected to an end of wire D. The resulting wire has a resistance of 731 2. Determine the resistances of wires C & D. 2 S2 Rc= Ro=

University Physics Volume 2

18th Edition

ISBN:9781938168161

Author:OpenStax

Publisher:OpenStax

Chapter9: Current And Resistance

Section: Chapter Questions

Problem 55P: A 20.00-V battery is used to supply current to a 10-k resistor. Assume the voltage drop across any...

See similar textbooks

Related questions

Q: A friend is working on a biology experiment and needs to create an electric field of magnitude 430…

Q: Willy Wonka is in court for running a red light (675 nm). He tells the judge that it was indeed, a…

Q: A car travels 30 miles S, then 20 miles W, then 15 miles 45° W of N. a) Determine the resultant R…

A: A vector is a quantity that is having both magnitude and direction. Velocity, acceleration,…

Q: A horizontal power line carries a current of 3910 A from south to north. Earth's magnetic field…

Q: How does Gauss' law explain that excess charge on a conductor must reside on the outside surface?

A: Because electric field inside a conductor at anypoint is zero.so all the excess charge must be on…

Q: (a) Find the electric potential difference VB - VA due to a point charge 91 = -2.06 nC that is 0.300…

A: charge (q1) = -2.06 nC distance of charge from location A = 0.300 m distance of charge from location…

Q: A stone is dropped from the top of a tall building. After 13 s of free fall, what is the…

Q: a physics student on planet exidor throws a ball, and it follows the parabolic trajectory shown in…

Q: net gravitational force, in unit-vector form,

A: Given: A set of masses as m1=20 kg, m2=10 kg and m3=10 kg Mass m1 is at origin. Position coordinates…

Q: A 8 Assume the sign weighs 10 lbs and is hanging as shown. Assume the system is in equilibrium a.…

Q: 1) Imagine an infinitely long rod with uniform charge density, λ=12e/m. a. What is the electric…

Q: A computer model displays the motion of a particle on a coordinate system in real time. At time t =…

A: Given At time t = 0, the particle is at the origin velocity components ux = 0 and uy = 6.0 m/s.…

Q: the energy neede to keep a 75watt bulb burning for 1 hour is 270kj. how much energy is needed to…

Q: Looking at the following 4-line summary, describe the most significant type of error present in the…

A: 1. The most significant type of error present in the data is the random error. This can be inferred…

Q: The two vectors a and b in the figure have equal magnitudes of 14.9 m and the angles are 0₁ = 26°…

Q: Current Attempt in Progress When point charges q1 = +2.9 µC and q2 = +2.5 µC are brought near each…

A: first charge (q1) = 2.9 μC Second charge (q2) = 2.5 μC repulsive force (F) = 0.59 N let the distance…

Q: 2. The color code on a resistor in a circuit indicates a value of R = 156,0000 a. Express in Powers…

Q: Answer the following: Since all of the particle’s acceleration is in the ________ direction, none…

A: Given Acceleration is at 90° to the direction of velocity. We have fill the empty space.

Q: Suppose you were able to position a microphone directly above a speaker's vocal cords so that you…

A: The speech would be less intelligible if the microphone was positioned directly above the speaker's…

Q: (b) A rectangular block of wood is measured to have the dimensions 11.2 cm x 3.4 cm x 4.10 cm.…

Q: Find the equivalent resistance of the combination of resistors R₁ = 42.0 2, R₂ = 75.0 2, R3 = 33.0…

Q: A small sphere is connected to a lightweight cord of length L = 1.40 m that is tied to a point P, as…

A: Given:- The length of the cord is L = 1.40 m which is tied to a point P. The mass of the sphere is…

Q: Current Attempt in Progress An unstrained horizontal spring has a length of 0.34 m and a spring…

A: Given, Spring constant = 320 N/m Length = 0.34 m Spring stretches by = 0.027m We need to calculate,…

Q: An ore sample weighs 16.5 N in air. When the sample is suspended by a light cord and totally…

Q: 5. A 100 kg box was pushed horizontally along a floor by a force of 308 N. The box experiences a…

Q: Property 3: ax (b + c) = a × b + ax c

A: Yes, the property you've stated is called the distributive property. In mathematics, the…

Q: a physics student on planet exidor throws a ball, and it follows the parabolic trajectory shown in…

A: velocity of ball at 1 s = ( 2i^ + 2j^) mstime when the ball is at highest point = 2 s

Q: What is the potential difference between the terminals of a battery that can impart 7.2 x 10-19 J to…

A: Given: Energy gained by an electron moving between the terminals of a battery W=7.2×10-19 J.…

Q: Identical point charges of +2.9 µC are fixed to three of the four corners of a square. What is the…

Q: A charge q₁ equal to 0.600 μC is at the origin, and a second charge 92 equal to 0.900 μC is on the x…

Q: The drawings show three charges that have the same magnitude but may have different signs. In all…

A: a) Draw the FBD of the system in scenario a.

Q: A +3 mC charge sits at the origin/at point (0,0). A +9 mC charge is directly 7 m to the left of the…

Q: A long solid copper cylinder has radius 1.0 cm and length of 90.0 cm. The electric field at the…

A: Given Data, Radius of the cylinder (r)=1.0 cm Length of the cylinder (L)=90.0 cm Electric Field…

Q: If a lens has a power -7.12D, what is its focal length?

A: Given: Power of the lens P=-7.12 D. Required: Focal length of the lens f. Power of a lens can be…

Q: ) What temperature is required for a black body spectrum to peak in the X-ray band? (Assume that E =…

Q: Three 1.0-C charges are equally spaced on a straight line. The separation of each charge from its…

Q: Q2. A conducting sphere of radius R is maintained at a constant potential. a) What is the total…

A: When a unit positive test charge is applied from infinity to point P, the potential at P equals the…

Q: The following two lists give the diameters and sound frequencies for three loudspeakers. Pair each…

A: Solution:-

Q: Three charged particles, A, B, and C, are placed in a line. Particles A and B are fixed in place.…

A: (a) The diagram can be represented as follows: A -- B -- C, where A and B are fixed and C is the…

Q: A solid lead sphere of volume 1 m3 is lowered to a depth in the ocean where the water pressure is…

A: Given:- A solid lead sphere of volume V = 1 m3. The lowered to a depth in the ocean where the water…

Q: Show wich of the numbers after unit conversionare correct. What is 0.05 km in cm?…

A: Given There are five conversion of unit are mention We have to choose the correct conversion.

Q: 3. Determine the resistor value, low and high tolerance (or range) for the following color-coded…

Q: Two charged particles are fixed to the x-axis. Particle Q₁ = +20.0 μC is located at x = 0.2 m, and…

A: The given values are listed below. Q1=+20 μCQ2=-80 μCx2=0.8 mx1=0.2 m

Q: You are riding in a boat whose speed relative to the water is 6.1m/s. The boat points at an angle of…

Q: A thin spherical shell of radius R = 5 cm is charged with a uniform charge distribution σ = 1 µC/cm2…

A: Gauss's Law states that the flux of the electric field through a closed…

Q: A 70 kg snowboarder starts from rest in the position shown. His velocity along the circular track…

Q: magnitude and direction of the electric field

A: Given: Three charges as q1=+4 nC, q2=-6.5 nC and q3=-3.5 nC Charges are placed at the corners of…

Q: Starting from rest, a DVD steadily accelerates to 500 rpm in 1.0 s, rotates at this angular speed…

Q: A small 7.00-g plastic ball that has a charge q of 1.70 C is suspended by a string that has a length…

Q: What is the net electric potential at the point P on the triangle show below? -5q m -3q m m P

A: Given:- The two charges are shown in the figure as Find:- What is the net electric potential at…

Concept explainers

Temperature Variance of Resistance

Electrical resistance or simply resistance is the property of a material that opposes the free flow of electrons through it. The total amount of resistance to the flow of charges (or current) is affected by many factors like the length of the conducting material, its cross-sectional area, resistivity, and temperature.

Question

100%

Part 2: Cross-sectional area
Wire D's cross-sectional area is 18 times the cross-sectional area of wire C. Each wire has the same length & resistivity. An end of wire C is connected to an end
resistance of 731 2. Determine the resistances of wires C & D.
Rc =
2
RD =
2
4
tv
A
f wire D. The resulting wire has a

Expert Solution

Step 1

Step by step

Solved in 3 steps with 3 images

SEE SOLUTION Check out a sample Q&A here

Follow-up Questions

Read through expert solutions to related follow-up questions below.

Follow-up Question

In step 3, where did the 19 come from, exactly?

Solution

by Bartleby Expert

SEE SOLUTION

Knowledge Booster

Learn more about

Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, physics and related others by exploring similar questions and additional content below.

Similar questions

Consider the circuits shown below, (a) What is the current through each resistor in part (a)? (b) What is the current through each resistor in part (b)? (c) What is the power dissipated or consumed by each circuit? (d) What is the power supplied to each circuit?
A car battery with a 12-V emf and an internal resistance of 0.050 is being charged with a current of 60 A. Note that in this process, the battery is being charged. (a)What is the potential difference across its terminals? (b)At what rate is thermal energy being dissipated in the battery? (c) At what rate is electric energy being converted into chemical energy?
Currents of approximately 0.06 A can be potentially fatal. Currents in that range can make the heart fibrillate (beat in an uncontrolled manner). The resistance of a dry human body can be approximately 100 k . (a) What voltage can cause 0.06 A through a dry human body? (b) When a human body is wet, the resistance can fall to 100 . What voltage can cause harm to a wet body?
A person with body resistance between his hands of 1.00 k accidentally grasps the terminals of a 20.0-kV power supply. (Do NOT do this!) (a) Draw a circuit diagram to represent the situation. (b) If the internal resistance of the power supply is 2000 , what is the current through his body? (c) What is the power dissipated in his body? (d) If the power supply is to be made safe by increasing its internal resistance, what should the internal resistance be for the maximum current in this situation to be 1.00 mA or less? (e) Will this modification compromise the effectiveness of the power supply for driving low-re si stance devices? Explain your reasoning,
Unreasonable Results (a) To what temperature must you raise a resistor made of constantan to double its resistance, assuming a constant temperature coefficient of resistivity? (b) To cut it in half? (c) What is unreasonable about these results? (d) Which assumptions are unreasonable, or which premises are inconsistent?
Why is the following situation impossible? A technician is testing a circuit that contains a resistance R. He realizes that a better design for the circuit would include a resistance 73R rather than R. He has three additional resistors, each with resistance R. By combining these additional resistors in a certain combination that is then placed in series with the original resistor, he achieves the desired resistance.
Consider the circuit shown in Figure P28.21 on page 860. (a) Find the voltage across the 3.00-0 resistor, (b) Find the current in the 3.00-12 resistor.
A 1,00-?O voltmeter is placed in parallel with a 75.0kresistor in a circuit, (a) Draw a circuit diagram of the connection, (b) What is the resistance of the combination? If the voltage across the combination is kept the same as it was across the 75.0-kresistor alone, what is the percent increase in current? (d) If the current through the combination is kept the same as it was through the 75.0-kresistor alone, what is the percentage decrease in voltage? (e) Are the changes found in parts (c) and (d) significant? Discuss.
How does the resistance for copper and for silicon change with temperature? Why are the behaviors of these two materials different?
A person with body resistance between his hands of 10.0k accidentally grasps the terminals of a20.0-kV power supply. (Do NOT do this!) (a) Draw a circuit diagram to represent the situation, (b) If the internal resistance of the power supply is 2000 , what is thecurrent through his body? (c) What is the power dissipated in his body? (d) If the power supply is to be made safe by increasing its internal resistance, what should the internal resistance be for the maximum current in this situation to be 1.00 mA or less? (e) Will this modification compromise the effectiveness of the power supply for driving low- resistance devices? Explain your reasoning.
(a) Digital medical thermometers determine temperature by measuring the resistance of a semiconductor device called a thermistor (which has a= - 0.0600/°C ) when it is at the same temperature as the patient. What is a patient's temperature if the thermistor’s resistance at that temperature is 82.0% of its value at 37.0°C (normal body temperature)? (b) The negative value for a may not be maintained for very low temperatures. Discuss why and whether this is the case here. (Hint: Resistance can’t become negative.)
(a) A defibrillator sends a 6.00-A current through the chest of a patient by applying a 10,000-V potential as in the figure below. What is the resistance of the path? (b) The defibrillator paddles make contact with the patient through a conducting gel that greatly reduces the path resistance. Discuss the difficulties that would ensue if a larger voltage were used to produce the same current through the patient, but with the path having perhaps 50 times the resistance. (Hint: The current must be about the same, so a higher voltage would imply greater power. Use this equation for power: P=I2 RP = .)