# Is there a magnetic field inside a coaxial cable?

## Is there a magnetic field inside a coaxial cable?

The magnetic field lines inside a coaxial cable form circles concentric with the inner conductor. To determine the flux we define a strip of area dA = l dr. The number of lines threading this loop is B dA = Bl dr.

## Is there magnetic field outside a coaxial cable?

The magnetic field in coaxial cable can be calculated in different cases which are as follows: ρ>c (Outside the outer conductor): It can be calculated by drawing an amperian path outside the outer conductor.

Why is the magnetic field outside a coaxial cable zero?

There is zero electric field outside the line. Because the outer conductor carries the same current as the inner one does (Figure 8.5), there is also zero magnetic field. A structure designed to guide a wave along a prescribed path is called a “waveguide” (Lorrain and Corson, 1979, p. 487).

What is the electric field in a coaxial cable?

The electric field inside a coaxial structure comprised of concentric conductors and having uniform charge density on the inner conductor is identical to the electric field of a line charge in free space having the same charge density.

### What is the magnetic field inside a hollow cylinder?

(2) Inside the hollow cylinder : Magnetic field inside the hollow cylinder is zero.

### What are the advantages of coaxial cable?

5 Unique Benefits of Coaxial Cable

• Coax Supports High Bandwidth Levels.
• Coax is Easy to Install.
• Coax is Easy to Locate.
• Coax Can Provide Power.
• Coax is Rugged.

What is the bandwidth of coaxial cable?

The transmission speed of coaxial cable is 10Mbps (megabits per second), and they offer 80 times more transmission capacity than twisted pair cables.

What is magnetic energy in physics?

Each magnetic field contains energy, also called magnetic energy. She is a constant in physics. Because a magnetic field is generated by electric currents, the magnetic energy is an energy form of moving charge carriers (electrons).

#### What is the capacitance of a coaxial cable?

Coaxial cable capacitors are easily made from RG-8 or RG-213 which have approximately 30pF capacitance per foot.

#### What is a coaxial cylinder?

[kō′ak·sē·əl ′sil·ən·dərz] (mathematics) Two cylinders whose cylindrical surfaces consist of the lines that pass through concentric circles in a given plane and are perpendicular to this plane.

Is there a magnetic field inside cylinder?

While inside the cylinder (r less than R) the magnetic field, which has only an angular component, increases as the square of the radial position. Outside of the cylinder there is no magnetic field.

How do you find the magnetic field of a cylinder?

dl̄̄ = µ₀I ⇒ B ∫dl = µ₀i. 2) Inside the hollow cylinder: Magnetic field inside the hollow cylinder is zero. 3) Inside the solid cylinder: Current enclosed by loop (I) is lesser than the total current. Current density is uniform, i.e. J = J ⇒ i’ = i x (A’ x A) = i (r²/R²), hence at inside point ∫B̄in.

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