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Olympiad workbook

Exam: Olympiad workbook
Subject: NSEP
Chapter: Electrostatics

Olympiad workbook · NSEP · Electrostatics

A thin semi-circular metal ring of radius R has a positive charge q...

A thin semi-circular metal ring of radius

R

has a positive charge

q

distributed uniformly over its curved length. The resultant electric field

\overrightarrow{\mathrm{E}}

at the center O is A thin semi-circular metal ring of radius R has a positive charge q distributed uniformly over its curved length. The

A thin semi-circular metal ring of radius R has a positive charge q distributed uniformly over its curved length. The

Options

A $-\hat{j} \frac{q}{2 \pi^2 \varepsilon_0 R^2}$
B $+\hat{j} \frac{q}{2 \pi^2 \varepsilon_0 R^2}$
C $+\hat{j} \frac{q}{4 \pi^2 \varepsilon_0 R^2}$
D $-\hat{j} \frac{q}{4 \pi^2 \varepsilon_0 R^2}$

Correct answer

A. $-\hat{j} \frac{q}{2 \pi^2 \varepsilon_0 R^2}$

Step-by-step solution

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