CBSE 2023 · Region 4 · Set 3 · Q27 · 3 marks
A current carrying circular loop and a straight wire bent partly in the form of a semicircle are placed as shown in the figure. Find the magnitude and direction of net magnetic field at point O. (Figure: a circular loop of radius $\displaystyle 4$ cm carrying $\displaystyle 1$ A, centred at O, sits concentrically inside a straight wire carrying $\displaystyle 2$ A that is bent into a semicircle of radius $\displaystyle 12$ cm about O, with straight sections running horizontally away from the semicircle's ends through O's line.)
Marking-scheme solution
Finding magnitude and direction of net magnetic field at point O
Moving Charges and MagnetismMagnetic Field on the Axis of a Circular Current LoopApplyshort_answermedium
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CBSE Class 12 Physics past-paper question from the 2023board exam, with the answer as CBSE’s own marking scheme gives it. Where our answers come from.