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Magnetic Force On Current-Carrying Wires: Example

Magnetic Force On Current-Carrying Wires: Example

In a magnetic field, moving charges encounter a force. If a wire contains these moving charges, i.e., if the wire is carrying a current, then a force acts on the wire as well. Consider a pair of flexible leads holding a wire that is 40 cm long and 10 g in weight in a horizontal position. The wire is placed in a constant magnetic field of 0.40 T, as shown in Figure 1(a). Determine the magnitude and direction of the current flowing in the wire needed to remove the tension in the supporting leads.

Magnetic Field Due to Two Straight Wires

Magnetic Field Due to Two Straight Wires

Consider two parallel straight wires carrying a current of 10 A and 20 A in the same direction and separated by a distance of 20 cm. Calculate the magnetic field at a point "P2", midway between the wires. Also, evaluate the magnetic field when the direction of the current is reversed in the second wire.

Magnetic Field Due To A Thin Straight Wire

Magnetic Field Due To A Thin Straight Wire

Consider an infinitely long straight wire carrying a current I. The magnetic field at point P at a distance a from the origin can be calculated using the Biot-Savart law.

Charging Conductors By Induction

Charging Conductors By Induction

The Earth is a good conductor of electricity, and it is so big that it can be considered an infinite source or sink of charges. It can easily exchange charges with any matter.
Generally, conductors like metals do not allow any excess charge to be present on them. Any excess charge added to metals easily flows away, for example, when a metal is placed on the Earth. This process is called earthing.
However, conductors can be charged by a process called induction. For example, consider charging a...

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Related Experiment Video

Updated: Jul 5, 2025

Construction of Microdrive Arrays for Chronic Neural Recordings in Awake Behaving Mice

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Published on: July 5, 2013

The disappearing hook wire: a case report.

Yong Ge^1,2, Jiayi Wang^1,2, Fayez Kheir³

¹Thoracic Surgery Laboratory, Xuzhou Medical University, Xuzhou, China.

Journal of Thoracic Disease

|January 22, 2024

Summary

This summary is machine-generated.

Hook wire migration during lung nodule localization to the pulmonary artery is rare. This case details successful surgical removal of a migrated hook wire from the pulmonary artery, preventing further complications.

Keywords:

Lung nodule case report hook wire pulmonary artery

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Published on: April 2, 2018

Area of Science:

Cardiothoracic Surgery
Interventional Pulmonology
Medical Imaging

Background:

Lung nodule localization is crucial for surgical resection.
Hook wires are commonly used for precise localization of small pulmonary nodules.
Migration of these wires presents a rare but significant complication.

Observation:

A 50-year-old female with multiple small pulmonary nodules underwent computed tomography (CT)-guided hook wire placement.
Post-placement, the hook wires could not be located in the intended lung lobe.
Intraoperative CT revealed migration of the localization wires into the main pulmonary artery.

Findings:

The migrated hook wires were successfully retrieved from the pulmonary artery via surgical dissection.
The patient experienced no further complications and was discharged five days post-procedure.
This highlights the potential for hook wire displacement into the pulmonary vasculature.

Implications:

Prompt and accurate diagnosis of wire migration is essential.
Surgical intervention, when feasible, can effectively resolve this complication.
Careful perioperative assessment is key to managing migrated localization devices and preventing adverse outcomes.