A positively charged ring is in y-z plane with its centre at origin. A positive test charge q_0 , he

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2. Electric Potential and Capacitance

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A positively charged ring is in $y-z$ plane with its centre at origin. A positive test charge $q_0$, held at origin is released along $x$-axis, then its speed

A

Increases continuously

B

Decreases continuously

C

First increases then decreases

D

First decreases then increases

Solution

(a)

$V=\frac{k q}{\sqrt{x^2+a^2}}$

$V$ decreases

So, $U$ decreases

So, $K$ increases

Standard 12

Physics

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