A hollow conducting sphere of radius 15 cm has a uniform surface charge density +3.2 μ C / m^2 . When a point charge q is placed at the centre of the sphere, the electric field at 25 cm from the centre just reverses its

Correct answer: D. -1.81 μ C No Solution

Olympiad workbook

Exam: Olympiad workbook
Subject: NSEP
Chapter: Electrostatics

Olympiad workbook · NSEP · Electrostatics

A hollow conducting sphere of radius 15 cm has a uniform surface...

A hollow conducting sphere of radius 15 cm has a uniform surface charge density

+3.2 \mu \mathrm{C} / \mathrm{m}^2

. When a point charge

q

is placed at the centre of the sphere, the electric field at 25 cm from the centre just reverses its direction keeping the magnitude the same. Therefore,

q

Options

A $+0.91 \mu \mathrm{C}$
B $-0.91 \mu \mathrm{C}$
C $+1.81 \mu \mathrm{C}$
D $-1.81 \mu \mathrm{C}$

Correct answer

D. $-1.81 \mu \mathrm{C}$

Step-by-step solution

No Solution

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