Answered: If the cross-sectional area of a wire…

If the cross-sectional area of a wire is doubted while keeping the current unchanged the current density will be a) Reduced to half c) Tripled b)Doubled d) Reduced 10 times

College Physics

1st Edition

ISBN:9781938168000

Author:Paul Peter Urone, Roger Hinrichs

Publisher:Paul Peter Urone, Roger Hinrichs

Chapter20: Electric Current, Resistance, And Ohm's Law

Section: Chapter Questions

Problem 14PE: Repeat the above example on Example 20.3, but for a wire made of silver and given there is one free...

See similar textbooks

Related questions

Q: Exercises: Use activity sheet for your answer. A. Solve the following problems accurately. Show your…

Q: In 1957 Stanley Smith Stevens proposed a law that relates the magnitude of a physical stimulus and…

Q: A solid cube 25.0 cm on each side is immersed in a fluid. The pressure at the top surface of the box…

Q: A box of apples of mass 22kg slides 2.5m down a ramp inclined at 44 degrees to the horizontal. The…

A: Given Mass, m = 22 kg Slides , L = 2.5 m Inclined plane of 43 degree Friction force ,Fr = 79 N…

Q: 1. A body of mass m starts from rest down a plane of length I inclined at an angle e with the…

Q: A monatomic ideal gas in a rigid container is heated from 42 °C to 94 °C by adding 8.88 × 104 J of…

Q: Find the current of '3 R, R, 200 100 10v 수v, 20v 2 B A) 0.429 A B) 0.356 A c) 0.286 A D) 0.143 A

Q: What is the rate of thermal radiation emitted from a star with a radius of 2.310 x 109 m and a…

Q: Draw a neat, labelled layout for the following OP departments: -Nephrology & Dialysis unit Also…

A: We have to write the concept of Nephrology & Dialysis unitAlso highlight the necessary support…

Q: An applied force of 89.4 N is used to accelerate an object across a frictional surface. The object…

A: applied force of Fapp = 89.4 N weight of object, W= mg=61.2 N and encounters a frictional force of…

Q: Exercises: Use activity sheet for your answer. A. Solve the following problems accurately. Show your…

Q: neatness. * I3 R,=10 2 D loop A R= 40 12.0 V E I2 loop B R,= 40 36.0 V F A B

A: According to kirchhoff's first law Algebraic sum of current at a junction is always zero. According…

Q: How does the speed of sound behave in a solid verses a gas?

Q: A space station shaped like a giant wheel has a radius of 113 m and a moment of inertia of 4.63 x 10…

Q: A proton is held at the positive plate parallel arrangement. The plates are 1.45 cm apart and the…

A: Given Separation between the plate is d=1.45 cm=0.0145 m Potential energy of the proton is…

Q: For a spring-powered candy dispenser, which of the statements correctly expresses the relationship…

A: Let the spring constant of the spring = k let the mass of candy = m let the compression distance = d…

Q: Use the conversion factors: IP-748 gullon 60 min=I hr I psi - 6869.491 Pa Convert the units. 60 min…

Q: Problem 5 - Collisions A train car of mass mA = 31.8 x 103 kg travels at an initial speed va = 1.58…

A: Hi, you have submitted multiple subpart questions and it is not specified which parts you need help…

Q: 1. Explain the connection between electricity and magnetism using Oersted Law. 2. How does a compass…

Q: I FIGURE EX32.24 shows voltage and current graphs for an inductor a. What is the emf frequency f? b.…

Q: A spherical, non-conducting shell of inner radius r= 20 cm and outer radius r2= 25 cm carries a…

Q: Ideal incompressible water is flowing in a drainage channel of rectangular cross-section. At one…

A: Given Width of the channel at point 1 is w1=12 m Depth of water at point 1 is d1=6.0 m Speed of…

Q: When a 4 V battery is connected to a capacitor, what is the voltage across the capacitor after a…

Q: Which of the following is a property associated with strong permanent magnets? Materials with this…

A: Permanent magnets are the magnets which don't loose their magnetism with time . Electromagnets are…

Q: 2. A demonstration Van de Graaff generator has a 30.0-cm-diameter metal sphere that produces a…

Q: At a parking garage, a motorcycle waits at rest. 8 minutes later, the driver notices a car passes…

A: The Motorcycle will overtake the car after 13.15 sec of noticing the car.

Q: Use the conversion factors: 5.615 f = 1 bbl 1 min = 60 s %3D 14.75 psi = 1 atm %3D Convert the…

Q: A yo-yo is constructed of three disks: two outer disks of mass MM, radius RR, and thickness dd, and…

A: Moment of inertia of disk=1/2Mr² We have to find the tension.

Q: figure below shows a freely rotating pulley of radius R. On the right side of the pulley hangs a…

A: For equilibrium net force as well as net torque acting on the body must be zero and horizontal as…

Q: 1According to the Michelson and Morley experiments, which of the following is NOT true? The laws…

A: We can answer the first question since the exact one is not specified. Please resubmit the question…

Q: 5. (a) How much heat transfer occurs to the environment by an electrical power station that uses…

A: Write the given values with the suitable variables. QH=1.25×1014 Jη=42 %=0.42 Here, QH is the amount…

Q: A sample of Uranium ore is estimated to have originally contained 805 mg of uranium-238. Analysis…

A: “Since you have asked multiple questions, we will solve the first question for you. If you want any…

Q: 1Which of the following relativistic statements seems to contradict what we know in classical…

A: The relativistic statements seems to contradict what we know in classical physics is given by…

Q: Exercises: Solve the following problems accurately. Show your complete solution. Use activity sheet…

Q: A wire of length L and resistance R is stretched so that the length is doubled and area of cross…

Q: What are the implications of Ampere’s, Faraday’s and Biot- Savart law on magnetism.

A: We have to write the implications of Ampere’s, Faraday’s and Biot- Savart law on magnetism.

Q: A wire of length L and resistance R is stretched so that the length is doubled and area of cross…

Q: A sailor wants to navigate his boat such that it travels East. The boat has an engine and can travel…

Q: A force of 12 N pulls a block of mass 3.5 kg through a rope of mass 0.5 kg . The block is resting on…

A: Given data: Force (F) = 12 N Mass of block (m1) = 3.5 kg Mass of rope (m2) = 0.5 kg Required: The…

Q: 2Which of the following best describes a frame of reference? an experiment that proved that…

Q: An empty rectangular box of negligible mass measures 5.0 m long, 1.0 m wide, and 0.50 m high. How…

A: When the box is about to sink, weight of the box along with loaded mass is equal to byovant force…

Q: Here is my grandson walking on a steel bridge on a cool February day. The temperature that day was 5…

A: Hi according to company guidelines, we are allowed to solve only one question thank you. Datawe have…

Q: The temperature coefficient of resistance of a wire is 0.00125 per degree celcius. At 300K its…

Q: 4. Arrange the following from highest to lowest current. Show circuit diagrams of each. a. 1.40…

Q: Consider the plate from the previous question. The floor provided an impact force that acted on the…

A: Given T = time taken = 0.00024 sec Initial speed, U = 3 m/s Final speed V = 0 m/s Mass of of…

Q: A particle is located at the position vector r = (7.00î + 8.00ĵ) m and a force exerted on it is…

Q: Shown below is the velocity vector for an object that is speeding up. Identify which of the other…

A: Given Data: The figure given in the problem represents the velocity vector for an object making 80°…

Q: why should the center weight be less than the sum of the left and right weights?

A: An object is considered to be in a condition of equilibrium when all of the forces acting on it are…

Q: 1. A cylinder is pressurized to 3.44 X10^5 Pa. As heat is added and the gas expands, the piston is…

A: Given Data: The pressure inside the cylinder is: P=3.44×105 Pa The initial volume of the cylinder…

Q: 3. The force between a 2.5 kg Chicken and the Earth is 25 N. How close must two protons (2.3 X 1017…

A: Write the given values with suitable variables. m=2.5 kgF=25 Nq=2.3×10-17 C Here, m is the mass of a…

Concept explainers

Ohm's law

Ohm’s law is a prominent concept in physics and electronics. It gives the relation between the current and the voltage. It is used to analyze and construct electrical circuits. Ohm's law states that the voltage across a conductor is directly proportional to the current flowing through it.

Path of Least Resistance

In a series of alternate pathways, the direction of least resistance is the actual or metaphorical route that offers the least resistance to forwarding motion by a given individual or body.

Question

If the cross-sectional area of a wire is doubted while keeping the current unchanged the current density will be

a) Reduced to half c) Tripled

b)Doubled d) Reduced 10 times

Expert Solution

This question has been solved!

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

SEE SOLUTION Check out a sample Q&A here

Step 1

VIEW

Step 2

VIEW

Step by step

Solved in 2 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

The current supplied by a battery in a portable device is typically 0.15 A. Find the number of electrons passing through the device in one hour.
Repeat the above example on Example 20.3, but for a wire made of silver and given there is one free electron per silver atom.
A wire is 0.86 m long and 1.1 mm2 in cross-sectional area. It carries a current of 4.0 A when a 1.6 V potential difference is applied between its ends. Calculate the conductivity σ of the material of which this wire is made.
The resistance of a thick wire is more than that of a thin wire of the same length and of the same material. Select one: O True O False
An 18-gauge copper wire with a diameter of 3-mm carries a constant current of 1.2-A. The charge concentration in the wire is 8.5 x 1028 per cubic meter. Determine the drift velocity in um2/s. Use q = 1.602 x 10-19.
Describe what will happen to the resistance offered by a conductor given the following changes in properties: a) Increase in electrical resistivity -b) Decrease in electrical conductivity -c) Lowering of temperature -d) Icrease in length -e) flattering -
An 18-gauge copper wire with a diameter of 3-mm carries a constant current of 1.2-A. The charge concentration in the wire is 8.5 x 1028 per cubic meter. The cross-sectional area is 0.0000015-m2. Determine the resistance of a 100-m wire in milli-ohm. Use q = 1.602 x 10-19 and resistivity equal to 1.72x10-8 ohm-m.
A nichrome wire of length 1.5 m is used as conductor. The cross-sectional area of the wire is 0.75 m2. Calculate for the resistance of the nichrome wire. (Resistivity of nichrome is 1.00 x 10-6 Ω)
An electric heater has a coiled metal wire which draws a current of 100 A. The resistance of the wire is 3.1 ohms. Calculate the voltage that must be established to it.
A wire is to be shaped into a conductor with the minimum resistance. Its length and cross-sectional area must be a) L and 2A b) 2L and A c) 2L and 2A d) L and A
An 18-gauge copper wire with a diameter of 3-mm carries a constant current of 1.2-A. The charge concentration in the wire is 8.5 x 1028 per cubic meter. The cross-sectional area is 0.0000015-m2. Determine the potential difference in V between two points in a wire that is 22-m apart. Use q = 1.602 x 10-19 and resistivity equal to 1.72x10-8 ohm-m.
An annealed copper wire of uncknown lenght has a diameter of .499 cm. and a resistance of .203 ohm. By several successive passes through drawing dies the radius of the wire is reduced to .126 cm. Assuming its resistivity has increased by 19.1 % in the drawing process, calculate the resistance of the reduced size wire.