What Is the Electric Field Magnitude at r for Concentric Spheres?

In summary, an electric field magnitude problem involves calculating the strength or magnitude of an electric field at a given point in space using the electric field equation. To solve such a problem, one needs a good understanding of the equation and basic algebra and trigonometry, as well as the ability to visualize the problem through a diagram. Electric field magnitude is typically measured in units of volts per meter, newtons per coulomb, or volts per centimeter. The magnitude of an electric field is affected by factors such as distance between charged objects, magnitude of their charges, and the medium through which the field is passing. Understanding electric field magnitude is important for predicting and controlling the behavior of electrically charged objects, and is crucial in fields such as engineering
  • #1
divr
3
0
There are three concentric thin spheres of radii a,b, c (a>b>c). The outer surface charge densities of their surfaces are σ, -σ and σ respectively. Find the magnitude of electric field at r (distance from centre) such that a>r>b ??

My answer was,

Er = [ K σ . 4 (pi) c2 / r2 - K σ . 4 (pi) b2 / r2 ]

But the answer is given as,

4(pi) b2 / r2
 
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  • #2
If 1/K=epsilon, I think your answer is correct.
 

FAQ: What Is the Electric Field Magnitude at r for Concentric Spheres?

What is an electric field magnitude problem?

An electric field magnitude problem is a type of physics problem that involves calculating the strength or magnitude of an electric field at a given point in space. This is typically done by using the electric field equation, which takes into account the distance between two charged objects and the magnitude of their charges.

How do I solve an electric field magnitude problem?

To solve an electric field magnitude problem, you will need to have a good understanding of the electric field equation and how to use it. You will also need to be familiar with basic algebra and trigonometry, as these concepts are often involved in these types of problems. It is also helpful to draw a diagram to visualize the problem and identify any given values.

What units are used to measure electric field magnitude?

Electric field magnitude is typically measured in units of volts per meter (V/m). This represents the strength of the electric field at a given point in space. Other commonly used units include newtons per coulomb (N/C) and volts per centimeter (V/cm).

What factors affect the magnitude of an electric field?

The magnitude of an electric field is affected by several factors, including the distance between charged objects, the magnitude of their charges, and the medium through which the electric field is passing. For example, the electric field will be stronger if the distance between two charged objects is smaller, or if the magnitude of their charges is larger.

Why is understanding electric field magnitude important?

Understanding electric field magnitude is important because it allows us to predict and control the behavior of electrically charged objects. This knowledge is essential in many fields, including engineering, electronics, and telecommunications. It also helps us understand basic principles of electricity and magnetism, which are fundamental to our understanding of the natural world.

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