A scientist just bought a very cool magnet, and would like to measure it’s strength. She takes a strip of copper with width 3.0cm, and a rectangular cross-section of 0.004m^2 and runs a current of 0.5A through it. She knows copper has a free charge density of 8.491× 10^28 m−3. She holds the magnet near the strip, and measures a voltage across the sides of the strips, and her voltmeter reads 11.2 nV- what is the strength of her magnet?

A scientist just bought a very cool magnet, and would like to measure it’s strength. She takes a strip of copper with width 3.0cm, and a rectangular cross-section of 0.004m^2 and runs a current of 0.5A through it. She knows copper has a free charge density of 8.491× 10^28 m−3. She holds the magnet near the strip, and measures a voltage across the sides of the strips, and her voltmeter reads 11.2 nV- what is the strength of her magnet?

Principles of Physics: A Calculus-Based Text

5th Edition

ISBN:9781133104261

Author:Raymond A. Serway, John W. Jewett

Publisher:Raymond A. Serway, John W. Jewett

Chapter19: Electric Forces And Electric Fields

Section: Chapter Questions

Problem 4CQ

See similar textbooks

Similar questions

A current of 0.300 A through your chest can send your heart into fibrillation, ruining the normal rhythm of heartbeat and disrupting the flow of blood (and thus oxygen) to your brain. If that current persists for 2.00 min, how many conduction electrons pass through your chest?
A cylindrical copper wire transmits a charge of 360 °C in 10 minutes. Copper, 8.5x10^28 free per cubic metercontains electrons. If the radius of the wire is I mm, what is the drift velocity of the electrons (in mm's)(take e=1.6x10^-19 C, pi=3) ? A) 0.015 B) 0.055 C) 0.045 D) 0.025 E) 0.035
What is the current (in A) when a typical static charge of 0.340 µC moves from your finger to a metal doorknob in 4.00 µs?
Earth's lower atmosphere contains negative and positive ions that are produced by radioactive elements in the soil and cosmic rays from space. In a certain region, the atmospheric electric field strength is 154 V/m and the field is directed vertically down. This field causes singly charged positive ions, at a density of 802 cm-3, to drift downward and singly charged negative ions, at a density of 719 cm-3, to drift upward (see the figure). The measured conductivity of the air in that region is 2.13 × 10-14 (Ω-m)-1. Calculate (a) the magnitude of the current density and (b) the ion drift speed, assumed to be the same for positive and negative ions.
Part 7 of 8 - Analyze Now the friends try a homework problem. A capacitor is constructed with two parallel metal plates each with an area of 0.56 m² and separated by d = 0.80 cm. The two plates are connected to a 5.0-volt battery. The current continues until a charge of magnitude Q accumulates on each of the oppositely charged plates. Find the electric field in the region between the two plates. 625 ✓ V/m Find the charge Q. 1.97e-10 X C Find the capacitance of the parallel plates. x 10-6 F Submit Skip (you cannot come back)
The discharging current in the atmosphere due to the small conductivity of air is known to be 1800 A on an average over the globe. Why then does the atmosphere not discharge itself completely in due course and become electrically neutral? In other words, what keeps the atmosphere charged?
Your desk lamp draws a current of 0.20 A for 500 s. How much charge fows through the lamp in this time? How many electrons fow through the lamp in this time? [Answer: (a) ∆Q = 100 C,(b) N = 6.3 × 1020 electrons]
Earth’s atmosphere is constantly bombarded by cosmic ray protons that originate somewhere in space. If the protons all passed through the atmosphere, each square meter of Earth’s surface would intercept protons at the average rate of 1500 protons per second.What would be the electric current intercepted by the total surface area of the planet?
A current of 0.300 A through your chest can send your heart into fibrillation, ruining the normal rhythm of heart beat and disrupting the flow of blood (and thus oxygen) to your brain. If that current persists for 1.39 min, how many conduction electrons pass through your heart?
Electrons flow through a 3.0-mm-diameter aluminum wire at 1.8×10−4 m/s. How many electrons move through a cross section of the wire each day?
How many free electrons are there in a rectangular block of a conductor whose dimension is 8 mby 4 m by 3 m? The electrons of this conductor have a drift velocity of 4 m/s when a 9.6 A of currentis applied thru a cross-sectional area of 0.005 m2 . Use electronic charge of 1.6 x 10 –19 coulomb perelectron. Express your answer in scientific notation whose unit is electrons per cubic meter.
Cylindrical-conductors has inner and outer radii of 2 mm and 100 mm, respectively. If V(p = 2 mm) = 150 V and V(p = 100 mm) = 0 V, Ɛr = 10, %3D dielectric conductivity 5x10-4 s/m, the dielectric resistance equals to 803.96 2 1024.59 2 1153.66 2 1245.23 2