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Grade: 10
        Using  = š›^0 H find the ratio E^0/H^0 for a plane electromagnetic wave propagating through vacuum. Show that it has the dimensions of electric resistance. This ratio is a universal constant called the impedance of free space.
5 years ago

Answers : (1)

Deepak Patra
askIITians Faculty
471 Points
							Sol. E = Q/Ļµ base 0 A (Electric field)
āˆ… = E.A. = Q/Ļµ base 0 A A/2 = Q/Ļµ base 0 2
i base 0 = Ļµ base 0 dāˆ… base E/dt = Ļµ base 0 d/dt (Q/Ļµ base 0 2) = 1/2 (dQ/dt)

						
5 years ago
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