Q1 / 142 · NTA Abhyas (JEE Main) 2020 · Physics · Electrostatics

An electric field E→=10x i^ N C-1 exists in space where x is measured in metre. Considering the potential at 10 m, 20 m to be zero, the potential at the origin is

  • A
    1000 V
  • B
    100 V
  • C
    375 V
  • Correct answer
    D
    500 V

Solution

dV=– E→.dr→

If V0 is the potential at the origin, then

∫0V0dV=-∫100E dx

⇒ V0=101022=500 V

Hence, the correct answer is option: 'D'.

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