Q4) Consider a resistor with length L, uniform cross-sectional area A, and uniform resistivity p that is carrying a current with uniform current density J. Find the electrical power dissipated per unit volume, p. Express your result in terms of (a) E and J; (b) J and p (c) E and p.

Q4) Consider a resistor with length L, uniform cross-sectional area A, and uniform resistivity p that is carrying a current with uniform current density J. Find the electrical power dissipated per unit volume, p. Express your result in terms of (a) E and J; (b) J and p (c) E and p.

University Physics Volume 2

18th Edition

ISBN:9781938168161

Author:OpenStax

Publisher:OpenStax

Chapter9: Current And Resistance

Section: Chapter Questions

Problem 63P: Consider a power plant is located 60 km away from a residential area uses Q-gauge (A=42.40mm2) wire...

See similar textbooks

Related questions

Q: 9. When a 40V battery is connected across an unknown resistor there is a current of 100 mA in the…

A: According to Ohm's law V=iRWhere V=Potential differencei=current flowR=resistance

Q: What percent of an iceberg is visible above the surface of the seawater with Pice = 0.917 g/cm3 and…

Q: 10. What prevents gravity from pulling you through the ground to the center of Earth? Choose the…

A: Gravity or gravitational force is a force experienced by every body/object which has a mass. For an…

Q: 36 V What is the voltage across C2? * C₁ = 12 μF C₂ = 4 µF 27 V O 6 V What is the voltage across C3?…

A: Moving electrons are responsible for electric current, thus 2nd option is correct for the first…

Q: 10. Observe the given Junction and then find the value of i. 8A 4A 8A 4F

A: As per guidelines only first question is solved here. Here first question is question no. 10 to find…

Q: When whirling a ball on a string in a circular path, if the string were to break the ball would fly…

A: Given data: The ball is moving in a circular path.

Q: Illustrate the problem and complete solution. 1.) A 0.20 kg mass is tied at the end of a 0.25 m…

A: Given mass(m)=0.20 kg length of string (l) =0.25 m angular speed(ω)=50 rpm

Q: An object takes 68 years to orbit the Sun. What is its average distance (in AU) from the Sun?

Q: A car of mass m slides across a patch of ice at a speed v with its brakes locked. It the hits dry…

Q: Consider the magnitudes of the following vectors: |A|=5.00, |B|-7.00, |C| =8.00 The dashed lines are…

A: Since you have posted a question with multiple sub-parts, we will solve first three sub-parts for…

Q: 9. What are the signs of the charges in the configuration shown in the figure? A. Charges 1, 2, and…

A: Let's understand the concept. If Electric field lines are coming out of the charge then charge can…

Q: What is the voltage across C2? C₁ = 12 µF C3 = 6 µF HH What is the voltage across C3? * C₁ = 12 µF…

Q: Problem #3 is for Questions #4-5 Problem #3: A copper wire with cross-sectional diameter of 1.13 mm…

Q: With respect to the electromagnetic spectrum we can say that: Select one: a. None of the above is…

A: Given data we have to select one correct option from above statement.

Q: Two identical balls of mass m are moving toward each other. One has a velocity of 20 m/s to the…

Q: = 1.8 x 10-6F. What changes do you think you will observe to the 5V 15μC? How? 1. C = Vab 5V…

A: Given C=1.8*10-6 F For Q=9*10-6 C Vab=5 V

Q: An object of mass 15 kg is moving with a uniform velocity of 4 ms-¹. What is the kinetic energy…

A: Introduction : In this question we are provided with value of mass and velocity . With these data…

Q: Claculate pressure Force=2.78 N Area=0.02 m2

Q: A force of 20 N moves an object in the direction of the force. The work done when the object moves…

A: Given data: Force (F) = 20 N Initial position = 2.0 m Final position = 4.0 m Required: The work…

Q: Q1) Are the following statements true or false? 1. An electric dipole consists of two charges Q,…

A: Answer:- (1) ----------- True Because When two equal and opposite charges are separated by a…

Q: Problem #3: A copper wire with cross-sectional diameter of 1.13 mm carries a current of 2 A. If the…

A: Given Data, Diameter (d)=1.13 mm Current (I)=2 A Number of electrons per cubic meter (n)=8×1028

Q: 4. Sphere A has mass ma = 0.06 kg, velocity magnitude va - 3.0 m/s making = an angle 25° with the +…

A: ma = 0.06 kg va = 3 m/s θa = 25omb = 0.04 kg vb = 4 m/s along +y axis mc = 0.05 kg vc = 5 m/s along…

Q: Particle A and particle B are held together with a compressed spring between them. When they are…

A: The energy stored in the compressed spring( potential energy), Ui=85 J When the spring is released,…

Q: The potential energy of two molecules is given by: U= 3 r7 - 5 r5. If r is the distance between two…

Q: A net force of 40 N acting on a block produces an acceleration of 8 m/s. What is the mass of the…

A: Given data : Force=F Acceleration=a Required : Mass

Q: "A circuit with parallel connected resistors of 2 ohms, 5 ohms, 10 ohms and 15 ohms. On which…

A: Given: The resistors 2 Ω, 5 Ω, 10 Ω and 15 Ω are connected in parallel.

Q: he density of air at 20 degree celcius is 1.204 kg/m3. The density at temperature 100 degree celcius…

A: Given: The density of the air at 20oC is 1.204 kg/m3. The density of the air at 100oC is 0.9467…

Q: given an acute angle provided by the angle of depression, if the opposite and the adjacent sides of…

A: Let the angle of depression be =a so tan(a)= opposite side /adjacent side.

Q: "for the circuit below, to obtain the power dissipated by R2, the ammeter & voltmeters should be…

A: Introduction: The current in the series connection is the same so the ammeter is always connected in…

Q: A pump handling a liquid raises its pressure from 1 bar to 30 bar. Take the density of the liquid as…

A: Given:Fluid Density ρ=990 kg/m3Pressure at Initial P1=1 barPressure at Final P2=30 bar

Q: The approximate distance by the expression 4.9t^2 , where t seconds is the time during which the…

A: The distance fallen by an object is given by the expression : d = 4.9t2

Q: 8 a. √f b. 2lf 4 c. If d. 32 30° Unpolarized light =000: A Polarizing Axis P1 P2 P3

A: Let the unpolarized beam of light have intensity I0 When a beam of light passes through a…

Q: Find the value of acceleration Force=22 N Mass=10 kg

A: Given data : Mass=m Force=F Required : Acceleration

Q: A step-up transformer has 2 turns in primary coil and 10 turns in the secondary coil. A student…

A: Transformer is a device which works on principle of electromagnetic induction. It is just used to…

Q: An apple is whirled round in horizontal circke on the end of a string which is tied to the stalk .…

A: A centripetal force must operate on a body rotating in a circle (or circular arc), which acts…

Q: A 20 horsepower engine is used to lift gravel from the ground to the top of a building 60 ft high.…

A: Write the given values with the suitable variables. P=20 hp=20×33000 ft-lb/min=660000 ft-lb/minh=60…

Q: What is the horizontal component of the force F that the wall exerts on the plank? O 1900 N O −1100…

A: The figure is missing here

Q: A certain drug is being administered intravenously to a hospital patient. mg Fluid containing 2 of…

A: Given: Amount of drug in the fluid = 2 mg/cm3 The rate of flow of the drug = 500 cm3/h Rate constant…

Q: Show the complete solution. 1.)The engines of an airplane exerts a force of 4,000 lb when traveling…

A: Power : Power is defined as the amount of energy consumed when work is done in unit time. Power can…

Q: Find work done F=12 N 14-5m

A: Given data: Force (F) = 12 N Displacement (d) = 5 m Required: Work (W)

Q: In electromagnetic induction, explain why does the voltmeter behave the way you observe it?

A: Given: In electromagnetic induction, explain why does the voltmeter behave the way you observe it?…

Q: A light rope is attached to a block with mass 4.00 kg that rests on a frictionless, horizontal…

A: Given : mass of block one m1=4 kg tension force in the rope T=10N

Q: H H Is it possible for two vectors, A and B, of unequal magnitudes to have a resultant of zero?…

Q: Q1) Are the following statements true or false? 1. An electric dipole consists of two charges Q.…

A: Since you have posted a question with a multiple sub parts, we will solve first three sub - parts…

Q: SITUATION. On a frictionless, horizontal air track, a glider oscillates at the end of an ideal…

A: For Simple harmonic oscillation the time period is T=2πmk where, m is the mass of the object k is…

Q: Three charged particles are arranged on corners of a square as shown in Figure shown below, with…

A: Electric field

Q: Given data: Density = 350 kg/m3 Mass = 24.4 kg Find the volume ? ||

A: The formula for density is, d = M/V where, d is density, M is mass, and V is volume.

Q: what formula is this "E= 33000×20×50 = 33000000 ft- lb. (1)"

A: This statement is nothing but the unit conversion of energy.

Q: A 1600 kg truck is sitting stationary on a 20 degree hill. How large is the friction force that…

A: Answer:- Mass of a truck(m) = 1600 kg Angle (A) = 200 Acceleration due to gravity (g) = 9.8 m/s2…

Q: Two 60.0 9 resistors are connected in parallel and this parallel arrangement is then connected in…

A: Please note : As per answering guidelines I can answer the first three sub-parts of a multisubpart…

Concept explainers

Microscopic view of current

In physics, the term current is expressed as the rate of flow of electric charges across the area per unit time (I=q/t). It propagates along in the direction of the motion of positive charges. When the current is caused by the motion of electrons, the direction of the current is opposite to the flow.

Question

Q4) Consider a resistor with length L, uniform cross-sectional area A, and uniform resistivity p that is carrying
a current with uniform current density J. Find the electrical power dissipated per unit volume, p. Express
your result in terms of (a) E and J; (b) J and p (c) E and p.

Expert Solution

This question has been solved!

Explore an expertly crafted, step-by-step solution for a thorough understanding of key concepts.

This is a popular solution!

SEE SOLUTION Check out a sample Q&A here

Step 1

Step 2

Step 3

Step 4

Trending now

This is a popular solution!

Step by step

Solved in 4 steps

SEE SOLUTION Check out a sample Q&A here

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

An electronic apparatus may have large capacitors at high voltage in the power supply section, presenting a shock hazard even when the apparatus is switched off. A “bleeder resistor" is therefore placed across such a capacitor, as shown schematically in Figure 21.50, to bleed the charge from it after the apparatus is off. Why must the bleeder resistance be much greater than the effective resistance of the rest of the circuit? How does this affect the time constant for discharging the capacitor?
Show that the power dissipated by the load resistor is maximum when the resistance of the load resistor is equal to the internal resistance of the battery.
Integrated Concepts (a) An immersion heater utilizing 120 V can raise the temperature of a 1.00 102 -g aluminum cup containing 350 g of water from 20.0°C to 95.0°C in 2.00 min. Find its resistance, assuming it is constant during the process. (b) A lower resistance would shorten the heating time. Discuss the practical limits to speeding the heating by lowering the resistance.
Discuss how the Hall effect could be used to obtain information on free charge density in a conductor. (Hint: Consider how drift velocity and current are related.)
Integrated Concepts (a) An aluminum power transmission line has a resistance of 0.0580/km. What is its mass per kilometer? (b) What is the mass per kilometer of a copper line having the same resistance? A lower resistance would shorten the heating time. Discuss the practical limits to speeding the heating by lowering the resistance.
In Figure 21.41. does the graph indicate the time constant is shorter for discharging than for charging? Would you expect ionized gas to have low resistance? How would you adjust R to get a longer time between flashes? Would adjusting R affect the discharge time?
Check Your Understanding Circuit breakers in a home are rated in amperes, normally in a range from 10 amps to 30 amps, and are used to protect the residents from harm and their appliances from damage due to large currents. A single 15-amp circuit breaker may be used to protect several outlets in the living room, whereas a single 20-amp circuit breaker may be used to protect the refrigerator in the kitchen. What can you deduce from this about current used by the various appliances?
Residential building codes typically require the use of 12-gauge copper wire (diameter 0.205 cm) for wiring receptacles. Such circuits carry currents as large as 20.0 A. If a wire of smaller diameter (with a higher gauge number) carried that much current, the wire could rise to a high temperature and cause a fire. (a) Calculate the rate at which internal energy is produced in 1.00 m of 12-gauge copper wire carrying 20.0 A. (b) Repeat the calculation for a 12-gauge aluminum wire. (c) Explain whether a 12-gauge aluminum wire would be as safe as a copper wire.
A spherical shell with inner radius ra and outer radius rb is formed from a material of resistivity . It carries current radially, with uniform density in all directions. Show that its resistance is R=4(1ra1rb)
Consider the circuit below, (a) What is the initial current through resistor R2? when the switch is closed? (b) What is die current through resistor R2 when the capacitor is fully charged, long after die switch is closed? (c) What happens if the switch is opened after it has been closed for some rime? (d) If the switch has been closed for a time period long enough for the capacitor to become fully charged, and then the switch is opened, how long before the current through resistor R1 reaches half of its initial value?
A 0.50-W, 220- resistor carries the maximumcurrent possible without damaging the resistor. If the current were reduced to half the value, what would be the power consumed?
Consider a power plant is located 60 km away from a residential area uses Q-gauge (A=42.40mm2) wire ofcopper to transmit power at a current of I = 100.00 A.How much more power is dissipated in the copper wires than it would be in superconducting wires?