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Electrostatics question

2010 · Shift 0 · Q68
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Electrostatics question

2010 · Shift 0 · Q68

JEE MainPhysicsElectrostaticsMCQ+4 / −1
A thin semi-circular ring of radius rrr has a positive charges qqq distributed uniformly over it. The net field E→\overrightarrow EE at the center OOO is AIEEE 2010 Physics - Electrostatics Question 229 English
  1. A
    q4π2ε0r2 j{q \over {4{\pi ^2}{\varepsilon _0}{r^2}}}\,j4π2ε0​r2q​j
  2. B
    −q4π2ε0r2 j- {q \over {4{\pi ^2}{\varepsilon _0}{r^2}}}\,j−4π2ε0​r2q​j
  3. C
    −q2π2ε0r2 j- {q \over {2{\pi ^2}{\varepsilon _0}{r^2}}}\,j−2π2ε0​r2q​j
  4. D
    q2π2ε0r2 j{q \over {2{\pi ^2}{\varepsilon _0}{r^2}}}\,j2π2ε0​r2q​j
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