Question:medium
A bob of a simple pendulum has a mass of \( 4 \, g \) and a charge of \( 20\mu C \). If it is at rest in a uniform horizontal electric field of intensity \( 1000 \, V m^{-1} \), the angle that the pendulum makes with the vertical at equilibrium is:
A bob of a simple pendulum has a mass of \( 4 \, g \) and a charge of \( 20\mu C \). If it is at rest in a uniform horizontal electric field of intensity \( 1000 \, V m^{-1} \), the angle that the pendulum makes with the vertical at equilibrium is:
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In such equilibrium problems, angle is found using \( \tan\theta = \frac{\text{horizontal force}}{\text{vertical force}} \).
Updated On: May 6, 2026
- \( \tan^{-1} \frac{1}{2} \)
- \( 60^\circ \)
- \( 30^\circ \)
- \( \tan^{-1} 2 \)
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The Correct Option is A
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