What is the electric field intensity outside a coaxial cable?

zero electric field
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.

How do you calculate dielectric constant of coaxial cable?

Coaxial Cable Equations

1. a = outside radius of inner conductor (inches)
2. b = inside radius of outer conductor (inches)
3. c = speed of light in a vacuum = 299,792 km/s = 186,282 mi/s.
4. ε = dielectric constant = ε0 * εr
5. ε0 = permittivity of free space = 8.85419×10-12 F/m.
6. εr = relative dielectric constant.

What is the formula of the capacitance of coaxial cylinders?

C′=2πϵln(b/a). This is by no means solely of academic interest. The capacitance per unit length of coaxial cable (“coax”) is an important property of the cable, and this is the formula used to calculate it.

Is coaxial cable a capacitor?

Coaxial cable as capacitor. Coaxial cable capacitors are easily made from RG-8 or RG-213 which have approximately 30pF capacitance per foot. The coax is gradually shortened until the desired capacitance is obtained.

Is there magnetic field outside a coaxial cable?

Well, if i sub a is equal to i sub b, if these two currents, that they’re equal in magnitude since they’re flowing in opposite directions, then i enclosed is going to be equal to 0. It means that magnetic field outside of the coaxial cable will be 0 for r greater than c region.

What is the resistance of coaxial cable?

The DC resistance of a coaxial cable is provided per unit length, with the resistance of the center conductor and sheath usually given separately. For example, manufacturers published data for the resistance of . 500” P3 cable is 1.35 ohms per 1k ft for the center conductor and . 37 ohm per 1k ft for the sheath.