AP EAMCET · PHYSICS · Electrostatics
An infinite line charge produces a field of \(9 \times 10^4 \mathrm{NC}^{-1}\) at a distance of \(2 \mathrm{~cm}\). Its linear charge density is
- A \(0.1 \mu \mathrm{C} \mathrm{m}{ }^{-1}\)
- B \(0.2 \mu \mathrm{C} \mathrm{m}{ }^{-1}\)
- C \(10 \mu \mathrm{C} \mathrm{m}^{-1}\)
- D \(20 \mu \mathrm{C} \mathrm{m}^{-1}\)
Answer & Solution
Correct Answer
(A) \(0.1 \mu \mathrm{C} \mathrm{m}{ }^{-1}\)
Step-by-step Solution
Detailed explanation
Electric field produced by infinite line charge, \[ \begin{aligned} & E=9 \times 10^4 \quad \mathrm{NC}^{-1} \\ & r=2 \mathrm{~cm}=2 \times 10^{-2} \mathrm{~m} \end{aligned} \] Linear charge density, \(\lambda=\) ? We know that,…
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