BuyFindarrow_forward

College Physics

11th Edition
Raymond A. Serway + 1 other
ISBN: 9781305952300

Solutions

Chapter
Section
BuyFindarrow_forward

College Physics

11th Edition
Raymond A. Serway + 1 other
ISBN: 9781305952300
Textbook Problem

Neurons in our bodies carry weak currents that produce detectable magnetic fields. A technique called magnetoencephalography, or MEG, is used to study electrical activity in the brain using this concept This technique is capable of detecting magnetic fields as weak as 1.0 × 10−15 T. Model the neuron as a long wire carrying a current and find the current it must carry to produce a field of this magnitude at a distance of 4.0 cm from the neuron.

To determine
The current the neuron has to carry to produce the given magnetic field.

Explanation

Given info: The MEG technique can detect magnetic field as weak as 1.0×1015T . The magnetic field has to be measured at 4.0cm from the neuron.

Explanation:

When the neuron is modeled as a long wire carrying current, the magnetic field will be

B=μ0I2πr

  • μ0 is the permeability of free space
  • I is the current
  • r is the distance of the point from the straight conductor

On re-arrangement,

I=2πrBμ0

Substitute 4π×107TmA-1 for μ0 , 1.0×1015T for B , 4.0cm for r to determine the current,

I=2π(4

Still sussing out bartleby?

Check out a sample textbook solution.

See a sample solution

The Solution to Your Study Problems

Bartleby provides explanations to thousands of textbook problems written by our experts, many with advanced degrees!

Get Started

Additional Science Solutions

Find more solutions based on key concepts

Show solutions add

Vitamin K is necessary for the synthesis of key bone proteins. T F

Nutrition: Concepts and Controversies - Standalone book (MindTap Course List)

What molecular formula corresponds to each of the following structural formulas?

General Chemistry - Standalone book (MindTap Course List)