General Physics> prob16...

what is mean by electric constant?
electric constant=1/(magnetic constant * speed of light)

please explain this equation.

nitin singh , 15 Years ago

Grade 12

2 Answers

Rathod Shankar AskiitiansExpert-IITB

The electric constant(ε₀₎ is a constant.

it appears Coulomb's law can be given as:

$F = \frac{1}{4 \pi \varepsilon_0} \ \frac{|q| |Q|}{r^2}$

$\varepsilon_0 = \frac{1}{\mu_0 c^2}$

here μ₀ = 4π × 10⁻⁷ N/A²

$\varepsilon_0 = \frac{10^7}{4\pi\,c^2} = 8.854\;187\;817... 10^{-12}$

ε₀=The permittivity of empty space

= equal to 1 in centimeter-gram-second electrostatic units and to 10⁷/4πc² farads permeter = 8.854 × 10^-12 farad per meter

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Last Activity: 15 Years ago

harini desiraju

the terms electric constant and magnetic constant are introduced while defining coloumb's inverse square law.These are used as proportionality constants in the fields of electricity and magnetism respectively.I am not aware of the derivation,but can tell u the relation between 'c' and these constants. light is an electromagnetic wave.So,its speed should describe the nature of both electric and magnetic waves. Thus we can accept this relation.(c²=1/electric const. * magnetic const.)

Last Activity: 15 Years ago