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AP EAMCET201726 Apr 2017Morning ShiftPhysicsElectrostaticsActual

An infinitely long thin straight wire has uniform linear charge density of 1 3 Cm ⁻¹ . Then the magnitude of the force acting on a charge 3 C situated at a point of 18 ~cm away from the wire is ( 1 4 ₀ =9 10^9 Nm ^2 C ⁻² )

Options

  1. A2 10^5 ~N
  2. B10^5 ~N
  3. C1 3 10^6 ~N
  4. D3 10¹¹ ~N

Correct answer

B. 10^5 ~N

Step-by-step solution

aligned & E= 2 ₀ r = 2 4 ₀ r = 9 10^9 2 1 3 18 10⁻² & = 1 3 10¹¹ ~N / C aligned So, F=q E=3 10⁻⁶ 1 3 10¹¹=10^5 ~N

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