Mathematics · Electrostatics
A uniformly charged disc of radius R having surface charge density σ is placed in the xy-plane with its center at the origin. Find the electric field intensity along the z-axis at a distance Z from the origin.
Verified Solution4 OptionsUpdated: October 2026👁️1 View
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- 1E = σ2ε0 ( 1(Z2+R2)1/2 + 1Z2 )
- 2E = σ2ε0 ( 1 - Z(Z2+R2)1/2 )✓
- 3E = σ2ε0 ( 1 + Z(Z2+R2)1/2 )
- 4E = 2ε0σ ( 1(Z2+R2)1/2 + Z )
Correct answer
E = σ2ε0 ( 1 - Z(Z2+R2)1/2 )
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