E-field from Time Varying B-field of Current wire

In summary, the conversation discusses the calculation of the electric field at a distance r from a time varying current carrying wire. The equation for the magnetic field created by the wire is given, and Faraday's law is mentioned as a way to calculate the electric field. The length of the wire is also mentioned as a factor to consider.
  • #1
kalashbhatt
1
0

Homework Statement


Time Varying Current carrying wire creates time varying magnetic field.How can we analytically calculate electric field at distance r from the time varying current carrying wire?

I(t) is time varying current

where α , β are angle of two ends of current carrying wire.

Homework Equations



B=μ*I(t)(sin(α)+sin(β)/(4*pi) direction given by right hand thumb rule.in Phi direction.
*consider length of wire to very very less than wavelength of changing current.*

The Attempt at a Solution


∇×E=−dB/dt .

dEψ/dz = −dB/dt .
 
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  • #2
Faraday's law can be written as

[itex]\oint[/itex][itex]\vec{E}[/itex].[itex]\vec{dl}[/itex] = - d∅/dt
 
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Related to E-field from Time Varying B-field of Current wire

What is an E-field?

An E-field, or electric field, is a physical quantity that describes the strength and direction of the electric force on a charged particle at any given point in space.

How is an E-field created by a time-varying B-field of a current wire?

According to Faraday's law of induction, a time-varying magnetic field (B-field) can induce an electric field (E-field) in the surrounding space. This means that when the current in a wire changes over time, it creates a time-varying B-field, which in turn induces an E-field.

What factors affect the strength of the E-field from a time-varying B-field of a current wire?

The strength of the E-field depends on the rate of change of the B-field, the distance from the wire, and the properties of the surrounding medium, such as its permeability and permittivity.

How is the direction of the E-field determined in relation to the B-field and the current wire?

The direction of the E-field is determined by the right-hand rule, which states that if you point your right thumb in the direction of the current flow, then the direction of your curled fingers represents the direction of the induced E-field. Additionally, the E-field is always perpendicular to the B-field and the wire.

What are some real-world applications of the E-field from a time-varying B-field of a current wire?

The E-field from a time-varying B-field of a current wire is used in various technologies, such as transformers, induction cooktops, and wireless charging. It is also a crucial concept in understanding electromagnetic waves and their propagation. Additionally, E-fields are important in many biological processes, such as nerve conduction and muscle contraction.

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