Write the expression for electric field …
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Gaurav Seth 4 years, 8 months ago
Consider an infinitely long thin straight wive with uniform linear charge q density λ. Let P be a point at ⊥r distance r from the wire.
To calculate the E.F E⃗ E→ at P, imagine a cylindrical Gaussian surface.
∴ The surface area of the curved part S = 2πrl
Total charge enclosed by the Gaussian surface q = λl
Electric flix through the end Surfaces of the cylinder is Φ = 0
Electric flux through the curved Surfaces of the cylinder is Φ2 = Ecosθ.s
Φ2 = E x 1 x 2πrl
The total electric flux Φ = Φ1 + Φ2
Φ = 0 + E2πrl, Φ2 = 2πrlE ………(1)
A/C to Gauss law,
from (1) and (2)
2Thank You