AIIMS 2018 | Electrostatics Question 2 | Physics

Positive charge $$Q$$ is distributed uniformly over a circular ring of radius $$R$$. A point particle having a mass $$(m)$$ and a negative charge $$-q$$ is placed on its axis at a distance $$x$$ from the centre. Assuming $$x < R$$, find the time period of oscillation of the particle, if it is released from there [neglect gravity].

$$\left[\frac{16 \pi^3 \varepsilon_0 R^3 m}{Q q}\right]^{1 / 2}$$

$$\left[\frac{8 \pi^2 \varepsilon_0 R^3}{q}\right]^{1 / 2}$$

$$\left[\frac{2 \pi^3 \varepsilon_0 R^3}{3 q}\right]^{1 / 2}$$

None of these

AIIMS 2018

MCQ (Single Correct Answer)

-0.33

Assertion Mass of a body decreases slightly when it is negatively charged.

Reason Charging is due to transfer of electrons.

Both Assertion and Reason are correct, Reason is the correct explanation of Assertion

Both Assertion and Reason are correct but Reason is not the correct explanation of Assertion

Assertion is correct and Reason is incorrect

Assertion is incorrect and Reason is correct

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Biology

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Human Health and Diseases Body Fluids and Its Circulation Locomotion and Movement Structural Organisation in Animals Digestion and Absorption Excretory Products and Their Elimination Chemical Coordination and Integration Human Reproduction Animal Kingdom Evolution