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Electrostatics question

2021 · 18 Mar · Shift 1 · Q47
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  5. /2021 · 18 Mar · Shift 1 · Q47

Electrostatics question

2021 · 18 Mar · Shift 1 · Q47

JEE MainPhysicsElectrostaticsMCQ+4 / −1
An oil drop of radius 2 mm with a density 3g cm −-− 3 is held stationary under a constant electric field 3.55 ×\times× 105 V m −-− 1 in the Millikan's oil drop experiment. What is the number of excess electrons that the oil drop will possess? (consider g = 9.81 m/s2)
  1. A
    48.8 ×\times× 1011
  2. B
    1.73 ×\times× 1010
  3. C
    17.3 ×\times× 1010
  4. D
    1.73 ×\times× 1012
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