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    • Posted by 🤟Royal Thakur 🤟 3 years, 11 months ago

    CBSE > Class 12 > Physics
    • 4 answers

    Aseem Mahajan 3 years, 11 months ago

    <iframe width="280" height="157" src="https://www.youtube.com/embed/ZyYqyYAKGC0" title="YouTube video player" frameborder="0" allow="accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture" allowfullscreen></iframe> <iframe width="280" height="157" src="https://www.youtube.com/embed/ZyYqyYAKGC0" title="YouTube video player" frameborder="0" allow="accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture" allowfullscreen></iframe>

    1Thank You

    🤟Royal Thakur 🤟 3 years, 11 months ago

    Thank you soo much #joy and aarzoo

    1Thank You

    Aseem Mahajan 3 years, 11 months ago

    B at centre of a ring = $$\dfrac{\mu_0I}{2R}$$
    I = $$\dfrac{q}{T}=qf$$

    Thus, B = $$\dfrac{\mu_0qf}{2R}$$

    1Thank You

    Aarzoo Soni 3 years, 11 months ago

    The answer is d in my opinion

    1Thank You

    ANSWER
    http://mycbseguide.com/examin8/

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