Question: Q. 1. Define the term ’electric flux’. Write its SI unit. What is the flux due to electric field E=3×103i^ N/C through a square of side 10 cm, when it is held normal to E ? R [Comptt. O.D. I, II, III 2013]

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Solution:

Ans. Electric flux is the number of electric field lines passing through a given area.

Its SI unit : NC1 m2 or Vm

Given : E=3×103i^ N/C, A=(10 cm)2=0.01 m2 and θ=0

ϕ=EAcosθ

ϕ=E.A=3×103×(0.1)2=30NC1 m2

[CBSE Marking Scheme, 2013]



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