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Related Concept Videos

Electrical Power01:07

Electrical Power

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Electric power is the product of current and voltage, represented in units of joules per second, or watts. For example, cars often have one or more auxiliary power outlets with which you can charge a cell phone or other electronic devices. These outlets may be rated at 20 amps and 12 volts, so that the circuit can deliver a maximum power of 240 watts. Consider a 25 Watt bulb and a 60 Watt bulb. The conversion of electrical energy produces heat and light, while the kinetic energy lost by the...
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Electric Field01:16

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Consider two point charges, each exerting Coulomb force on the other. It is possible to describe the Coulomb interaction via an intermediate step by defining a new physical quantity called the electric field.
In the new picture, imagine that the first charge sets up an electric field independent of all other charges in the universe. When another charge comes in its vicinity, the second charge experiences an electric force depending on the electric field at that point. The source charge does not...
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Determining Electric Field From Electric Potential01:12

Determining Electric Field From Electric Potential

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The electric field and electric potential are related to each other. If the electric field at various points in the region of interest is known, it can be used to calculate the electric potential difference between any two points. Similarly, if the electric potential is known for various points, then it is possible to calculate the electric field.
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Finding Electric Potential From Electric Field01:13

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For a system of charges, it is easy to calculate the system's potential because potential is a scalar quantity. However, in some instances where calculating the electric field is more straightforward than finding the potential, the electric field is used to calculate the system's potential. For a positive charge, the electric field is radially outward, and the potential is positive at any finite distance from the positive charge. In such an electric field, the motion away from the...
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Electric Field Inside a Conductor01:20

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When a conductor is placed in an external electric field, the free charges in the conductor redistribute and very quickly reach electrostatic equilibrium. The resulting charge distribution and its electric field have many interesting properties, which can be investigated with the help of Gauss's law.
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Electric Field Lines01:25

Electric Field Lines

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The three-dimensional representation of the electric field of a positive point charge requires tracing the electric field vectors, whose lengths decrease as the square of their distance from the charge and which point away from the charge at each point. This vector field is no doubt challenging to visualize. The visualization of electric fields becomes quickly intractable as the number of charges increases.
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Development of Whispering Gallery Mode Polymeric Micro-optical Electric Field Sensors
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A Power-Frequency Electric Field Sensor for Portable Measurement.

Dongping Xiao1, Qichao Ma2, Yutong Xie3

  • 1State Key Laboratory of Power Transmission Equipment & System Security and New Technology, Chongqing University, Chongqing 400044, China. xiaodongping@cqu.edu.cn.

Sensors (Basel, Switzerland)
|April 5, 2018
PubMed
Summary

A novel double spherical shell electric field sensor is introduced for high-voltage safety. This portable instrument accurately measures electric fields, enhancing inspection staff protection in hazardous environments.

Keywords:
double spherical shellperformance requirementsportable measurementpower frequency electric fieldsensor

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Area of Science:

  • Electrical Engineering
  • Sensor Technology
  • High-Voltage Safety

Background:

  • Traditional electric field measurement instruments lack portability and specialized performance for high-voltage environments.
  • Inspection staff in high-voltage settings require enhanced health and safety protection through accurate electric field monitoring.

Purpose of the Study:

  • To propose and validate a new portable electric field sensor for inspection staff safety in high-voltage environments.
  • To theoretically deduce the measurement principle and analyze influencing factors of the novel sensor.

Main Methods:

  • Theoretical deduction of mathematical relationships between induced voltage, circuit output, and free-space electric field.
  • Simulation analysis of sensor characteristics, including the influence of size and material.
  • Experimental validation with a physical prototype, including calibration and error analysis.
  • Experimental testing of the sensor's directional characteristics.

Main Results:

  • Theoretical analysis established the sensor's electric field measurement principle and key influencing factors.
  • Simulation results closely matched theoretical predictions, confirming sensor behavior.
  • Experimental data, after calibration, demonstrated the system's measurement accuracy and discussed error sources.
  • Directional characteristics of the proposed sensor were successfully determined through experimentation.

Conclusions:

  • The proposed double spherical shell sensor offers a viable solution for portable electric field measurement in high-voltage environments.
  • The study successfully validated the sensor's theoretical principles through simulation and physical experiments.
  • The developed sensor enhances health and safety for inspection personnel by providing reliable electric field monitoring.