1. The torque (τ) on a current-carrying coil is given by: τ = nI AB For fixed wire length l, the radius is: r = l/2πn Torque is maximized when n = 2, as the product of the number of turns and area is optimized. Answer: (B) Two For more visit here: https://www.tiwariacademy.com/ncert-solutions/class-12/Read more

    The torque (τ) on a current-carrying coil is given by:
    τ = nI AB

    For fixed wire length l, the radius is:
    r = l/2πn
    Torque is maximized when n = 2, as the product of the number of turns and area is optimized.

    Answer: (B) Two

    For more visit here:
    https://www.tiwariacademy.com/ncert-solutions/class-12/physics/chapter-4/

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  2. The gyro-magnetic ratio (γ) of an electron in a hydrogen atom, according to the Bohr model, is given by: γ = e/2m It is independent of the orbit number (n) as it only depends on fundamental constants (e and m). The ratio is negative because the electron has a negative charge. Answer: (B) Negative htRead more

    The gyro-magnetic ratio (γ) of an electron in a hydrogen atom, according to the Bohr model, is given by:

    γ = e/2m

    It is independent of the orbit number (n) as it only depends on fundamental constants (e and m). The ratio is negative because the electron has a negative charge.
    Answer: (B) Negative

    https://www.tiwariacademy.com/ncert-solutions/class-12/physics/chapter-4/

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