A charge of \( 4 \times 10^{-9} \mathrm{C} \) is distributed uniformly over the circumference of...

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A charge of \( 4 \times 10^{-9} \mathrm{C} \) is distributed uniformly over the circumference of a conducting ring of radius \( 0.3 \mathrm{~m} \). Calculate the field intensity at a point on the axis of the ring at \( 0.4 \mathrm{~m} \) from its center and also at the center?
a. \( 112 \mathrm{~N} / \mathrm{C}, 2 \mathrm{~N} / \mathrm{C} \)
b. \( 112 \mathrm{~N} / \mathrm{C}, 3 \mathrm{~N} / \mathrm{C} \)
c. \( 115.2 \mathrm{~N} / \mathrm{C} \), Zero
d. \( 113.2 \mathrm{~N} / \mathrm{C} \), Zero
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