Test Index

Electrostatics

Section: Physics

© examsnet.com

Question : 3 of 61

Marks: +1, -0

A positive point charge of

10^{-8} C

is kept at a distance of 20 cm from the center of a neutral conducting sphere of radius 10 cm . The sphere is then grounded and the charge on the sphere is measured. The grounding is then removed and subsequently the point charge is moved by a distance of 10 cm further away from the center of the sphere along the radial direction. Taking

\; \frac{1}{4\pi \varepsilon_0} = 9 \times 10^9 \, \mathrm{Nm^2/C^2}

\varepsilon_0

is the permittivity of free space), which of the following statements is/are correct?

[JEE Adv 2025 P2]

Before the grounding, the electrostatic potential of the sphere is 450 V .
Charge flowing from the sphere to the ground because of grounding is $5 \times 10^{-9} C$ .
After the grounding is removed, the charge on the sphere is $-5 \times 10^{-9} C$ .
The final electrostatic potential of the sphere is 300 V .

Go to Question:

Prev Question

Next Question