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Help me understand! Bob at pendulum mass 2g, charge , an electric field of intensity 2000v/m. Angle of pendulum with vertical at equilibrium?

Bob at pendulum mass 2g, charge , an electric field of intensity 2000v/m. Angle of pendulum with vertical at equilibrium?

  • Option 1)

    \Theta = tan^{-1}{\frac{1}{2}}

  • Option 2)

    \Theta = cot^{-1}{\frac{1}{2}}

  • Option 3)

    \Theta = sin^{-1}{\frac{1}{2}}

  • Option 4)

    \Theta = tan^{-1}{\frac{1}{4}}

 
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Option 1)

\Theta = tan^{-1}{\frac{1}{2}}

Option 2)

\Theta = cot^{-1}{\frac{1}{2}}

Option 3)

\Theta = sin^{-1}{\frac{1}{2}}

Option 4)

\Theta = tan^{-1}{\frac{1}{4}}

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