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Physics · 2023 · 2 marks
Moving Charges and MagnetismMagnetic Field on the Axis of a Circular Current Loop2 marksApplyvery short answer
CBSE 2023 · Region 3 · Set 3 · Q22
A wire of length L is bent round in the form of (i) a square, and then (ii) an equilateral triangle. If current I is passed through each of them,…
A wire of length L is bent round in the form of (i) a square, and then
(ii)
an equilateral triangle. If current $\displaystyle I$ is passed through each of them, find the ratio of magnetic moment of the square loop to that of the triangle.
Marking-scheme solution
For square loop; \(\displaystyle L=4 a \Rightarrow a=\frac{L}{4}\) Area of square loop \(\displaystyle =\frac{L^{2}}{16}\) For equilateral triangle; \(\displaystyle L=3 a \Rightarrow a=\frac{L}{3}\)
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CBSE Class 12 Physics past-paper question from the 2023 board exam, with the answer as CBSE’s own marking scheme gives it. Where our answers come from.