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NEET2026PhysicsChapterActual

An electric potential of 3 10^4 V is produced at a distance of 60 cm from an isolated point charge in air. The magnitude of the point charge is [ Take 1 4 ₀ = 9 10^9 N m ^2 C ⁻² ] :

Options

  1. A2 10⁻⁴ C
  2. B1.2 10⁻⁶ C
  3. C2 10⁻⁶ C
  4. D2 10⁻⁵ C

Correct answer

C. 2 10⁻⁶ C

Step-by-step solution

The electric potential V due to a point charge q at a distance r is given by V = 1 4 ₀ q r Substituting the given values: 3 10^4 = 9 10^9 q 0.6 q = 3 10^4 0.6 9 10^9 q = 1.8 10^4 9 10^9 q = 0.2 10⁻⁵ C q = 2 10⁻⁶ C Answer: 2 10⁻⁶ C

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