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Related Concept Videos

Magnetic Field Of A Current Loop01:16

Magnetic Field Of A Current Loop

Consider a circular loop with a radius a, that carries a current I. The magnetic field due to the current at an arbitrary point P along the axis of the loop can be calculated using the Biot-Savart law.
Force On A Current Loop In A Magnetic Field01:17

Force On A Current Loop In A Magnetic Field

Magnetic forces on wires carrying current are most frequently applied in motors. A DC motor is a device that converts electrical energy into mechanical work. In motors, wire loops are enclosed in a magnetic field. When current flows through the loops, the magnetic field applies torque, which causes the shaft to rotate. The direction of the current is reversed once the loop's surface area is lined up with the magnetic field, causing a constant torque on the loop. During the process, commutators...
Torque On A Current Loop In A Magnetic Field01:13

Torque On A Current Loop In A Magnetic Field

The most common application of magnetic force on current-carrying wires is in electric motors. These consist of loops of wire, which are placed between the magnets with a magnetic field. When current flows through the loops, the magnetic field applies torque, which causes the shaft to rotate, thus converting electrical energy to mechanical energy.
Consider a rectangular current-carrying loop containing N turns of wire, placed in a uniform magnetic field. The net force on a current-carrying loop...
Significance of Displacement Current01:28

Significance of Displacement Current

A displacement current is analogous to a real current in Ampère's law, participating in Ampère's law the same way as the usual conduction current. However, it is produced by a changing electric field. Displacement current is defined in terms of a time-varying electric field, and also has an associated displacement current density. By adding a term accounting for displacement current, Maxwell modified the existing Ampère's law, which is now called generalized Ampère's law.
Inductor in an AC Circuit01:16

Inductor in an AC Circuit

The basic components of an inductor are coils or loops of wire that are either wound around a hollow tube former or a ferromagnetic material (iron-cored) to increase their inductive value or inductance. When a voltage is applied across an inductor's terminals, a magnetic field is created, where the inductor stores its energy. The inductor's own self-induced or back emf value controls the growth of the current flowing through it.  This back emf voltage is proportional to the rate of variation of...
Electrical Current01:10

Electrical Current

Electrical current is defined as the rate at which charge flows. When there is a large current present, such as that used to run a refrigerator, a large amount of charge moves through the wire in a small amount of time. If the current is small, such as that used to operate a handheld calculator, a small amount of charge moves through the circuit over a long period of time. The SI unit for current is the ampere (A), named for the French physicist André-Marie Ampère (1775–1836). An ampere is the...

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Related Experiment Video

Updated: Jul 11, 2026

Functional Assessment of Intestinal Permeability and Neutrophil Transepithelial Migration in Mice using a Standardized Intestinal Loop Model
09:24

Functional Assessment of Intestinal Permeability and Neutrophil Transepithelial Migration in Mice using a Standardized Intestinal Loop Model

Published on: February 11, 2021

Winter intrusions of the loop current.

R L Molinari, S Baig, D W Behringer

    Science (New York, N.Y.)
    |November 4, 1977
    PubMed
    Summary
    This summary is machine-generated.

    The Loop Current in the Gulf of Mexico extended unusually far north for three consecutive winters. This finding is based on analysis of satellite and ship-based sea-surface temperature data.

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    Area of Science:

    • Oceanography
    • Climate Science

    Background:

    • The Loop Current is a major ocean current in the Gulf of Mexico.
    • Understanding its variability is crucial for predicting regional climate and marine ecosystems.

    Purpose of the Study:

    • To analyze the recent northward extent of the Loop Current.
    • To document an unusual pattern of Loop Current intrusion over the past three winters.

    Main Methods:

    • Utilized sea-surface temperature data from satellite observations.
    • Incorporated subsurface temperature data collected by ships.
    • Analyzed temperature data to track the Loop Current's northern boundary.

    Main Results:

    • The Loop Current extended significantly farther north than previously recorded.
    • This extended intrusion occurred over the last three consecutive winters.
    • Observed temperature anomalies indicate a persistent northward shift.

    Conclusions:

    • The recent behavior of the Loop Current suggests a notable change in its typical pattern.
    • Further research is needed to understand the drivers and implications of this extended northward intrusion.
    • This phenomenon may have significant impacts on Gulf of Mexico weather patterns and marine life.