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What Is the Potential Difference Between the Centre of the Sphere and the Surface of the Sphere? (Explained)

What Is the Potential Difference Between the Centre of the Sphere and the Surface of the Sphere? (Explained)

Three-dimensional figures have a significant place in mathematics. There are various three-dimensional shapes, including cubes, cuboids, cylinders, cones, and spheres.

The sphere is a three-dimensional shape of a circle. In this article, you’ll learn what is the potential difference between the surface of a sphere and the center of a sphere.

What is a Sphere?

A sphere is a three-dimensional object made up of all points that are equally spaced out from the center, which is a fixed point.

A line segment whose endpoints are on the sphere and which goes through the center of the object is said to have that object’s diameter.

A line segment with one end on the sphere and the other at the center is said to have a radius of a sphere. In three-dimensional space, a sphere is a collection of points that are all located at the same r-distance from a single point.

The radius of the sphere is denoted by the letter r, and the specified point represents its center. The work of the ancient Greek mathematicians contains the earliest recorded references to spheres.

Importance of Sphere

One of the most important mathematical objects is the sphere. In both nature and industry, spheres and nearly-spherical objects can be seen.

In an equilibrium state, bubbles like soap bubbles have a spherical shape. In geography, the Earth is frequently depicted as spherical, and the celestial sphere is a crucial idea in astronomy.

The majority of curved mirrors and lenses, pressure vessels, and other manufactured objects are built on spheres. The majority of balls used in sports and toys are spherical, as are ball bearings because spheres roll easily in any direction.

The point where a plane containing the sphere’s center intersects the sphere is known as the great circle of a sphere. Its endpoints are referred to as poles and its diameter is referred to as an axis.

A sphere with radius r has a volume of 4/3 πr³ and a surface area of 4πr2. Any four locations in space that are not on the same plane define a sphere.

As a result, a tetrahedron can be enclosed within a special sphere. The formula for a sphere with a centre at (a, b, and c) and a radius of r is (x-a)2 + (yb)2 + (z-c)2 = r2.

What is a Centre Point?

A center is a point that resides exactly in the middle of an object in the case of geometry; the word initializes from the Ancient Greek v (kéntron), which means “pointy object.”

A center is a fixed point of all the isometries that move an object onto itself if the geometry is thought of as the study of isometry groups.

The point that’s equally spaced from the points on the edges is the center of a circle. Similar to how the center of a line segment is the midpoint between the two ends, the center of a sphere is the point that is equally distant from all the points on its surface.

How to Find the Center of the Sphere?

The three-dimensional equivalent of circles is a sphere. A sphere’s equation is similar to a circle’s equation, but it includes an additional variable to account for the extra dimension.


Radius equals r in this equation. The location of the sphere’s center is indicated by the coordinates (h, k, l).

Consider a sphere whose center is C(3,8,1) and crosses through the point (4,3,−1). What is its equation?

Let’s insert the points into sphere equation: 

  • (x−h)2+(y−k)2+(z−l)2=r2
  • (x−3)2+(y−8)2+(z−1)2=r2

Since we already know that the sphere crosses the point (4,3,-1). We can insert this in for (x,y,z) and solve for r2.

  • (x−3)2+(y−8)2+(z−1)2=r2
  • (4−3)2+(3−8)2+(−1−1)2=r2
  • (1)2+(−5)2+(−2)2=r2
  • 1+25+4=r2
  • 30=r2

Now that we know the figure behind r2, and the center point, we can solve the equation of the sphere: (x−3)2+(y−8)2+(z−1)2=30.

Pi Number
Pi Number Mathematical Symbol

What is a Surface Area?

A surface is a mathematical representation of the everyday idea of a surface. Similar to how a curve generalizes a straight line, it is a generalization of a plane but unlike a plane, it may be curved.

Depending on the situation and the mathematicians’ methods employed for the study, there are a number of more precise definitions.

In Euclidean 3-space, planes and spheres are the most basic mathematical surfaces. Depending on the situation, a surface’s precise description could change.

A surface may typically cross itself in algebraic geometry (as well as have other singularities), but not in topology or differential geometry.

A moving point on a surface has the potential to move in two directions since it is a topological space with dimension two (it has two degrees of freedom).

To put it another way, a two-dimensional coordinate system is defined on a coordinate patch that is virtually always located around a point.

Latitude and longitude, for instance, offer two-dimensional coordinates on the Earth’s surface, which resembles (ideally) a spherical in two dimensions (except at the poles and along the 180th meridian).

A surface is frequently described by equations that may be solved using the coordinates of its points. This graph represents a continuous function with two variables.

Implicit Surface

An implicit surface is defined as the set of zeros of a function with three variables. A surface is algebraic if the defining three-variate function is a polynomial.

For instance, the implicit equation may define the unit sphere as an algebraic surface.


Another way to describe a surface is as the representation of a continuous function of two variables in a space with at least three dimensions.

In this instance, it is claimed to have a parametric surface parametrized by these two variables, also known as parameters. For instance, the Euler angles, also known as longitude u and latitude v, can be used to parametrize the unit sphere.

x2 + y2 + z2 = r2 is the equation of sphere
x2 + y2 + z2 = r2 is the equation of sphere

How to Find the Surface Area of Sphere?

Pi*R2 is the area of a disc encircled by a circle of radius R. A circle of radius R has a circumference calculated as 2*Pi*R. 

The latter is the derivative of the former with regard to R, as shown by a quick calculus check. Similarly, (4/3)*Pi*R3 is the volume of a ball enclosed by a sphere with a radius of R. 

And 4*Pi*R2 is the equation for a sphere with radius R’s surface area. It is also possible to verify that the latter is the derivative of the former with regard to R.

It’s not a coincidence, that’s for sure. A slight change in the ball’s radius results in a change in its volume, which is equal to the volume of a spherical shell with radius R and thickness (delta R).

Thus, the volume of the spherical shell is roughly equal to (surface area of the sphere)* (delta R). However, the derivative is merely the change in ball volume divided by (delta R), thus (surface area of the sphere). 

What is the 3-dimensional volume of its boundary if I tell you that the 4-dimensional “volume” of the 4-dimensional ball is (1/2)*Pi2*R4?

Potential Difference Between Centre of Sphere and Surface of Sphere?

The fact that the surface is three-dimensional and the sphere’s center is a (non-dimensional) point, and that their values are independent of one another, is a significant difference.

The center of the sphere and its surface has the same potential if the sphere is a conducting hollow spherical. There is no electric field present in a perfect conductor.

The surface of a dielectric sphere has a potential of KQ/(R) and the center is at zero potential.

Watch This Video for Calculating Potential Difference With Spherical Symmetry

Other Three-Dimensional Shapes

CubeFaces – 6 Edges – 12 Vertices – 8
CuboidFaces – 6 Edges – 12 Vertices – 8
SphereCurved Face – 1 Edge – 0 Vertices – 0
ConeFlat Face – 1 Curved Face – 1 Edge – 1 Vertex – 1
CylinderFlat Face – 2 Curved Face – 1 Edge – 2 Vertices – 0
Other three-dimensional objects


  • The sphere is a three-dimensional shape and it’s similar to a circle.
  • Spherical objects are quite common and we can see them around us all the time. It’s the most important shape in mathematics.
  • x2 + y2 + z2 = r2 is the sphere’s general equation.
  • An implicit surface is defined as the set of zeros of a function with three variables.
  • The center of the sphere and its surface has the same potential if the sphere is a conducting hollow spherical.

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