Which of the following represents field

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Target Exam

CUET

Subject

Physics

Chapter

Electric Charges and Fields

Question:

Which of the following represents field due to an infinitely long straight uniformly charged wire?

Options:

λ/2πε_or

λ/8πε_or

λ/4πε_or

2λ/πε_or

Correct Answer:

λ/2πε_or

Explanation:

Using Gauss law for a cylindrical gaussian surface of length l and radiua r

E. 2$\pi$rl = $\frac{\lambda l}{\epsilon_0}$

$\Rightarrow$ E = λ/2πε_or