1. The physical quantity with the unit J T⁻¹ (joule per tesla) is the magnetic dipole moment, which measures the strength and orientation of a magnetic source. For more visit here: https://www.tiwariacademy.com/ncert-solutions/class-12/physics/chapter-6/

    The physical quantity with the unit J T⁻¹ (joule per tesla) is the magnetic dipole moment, which measures the strength and orientation of a magnetic source.

    For more visit here:
    https://www.tiwariacademy.com/ncert-solutions/class-12/physics/chapter-6/

    See less
    • 12
  2. The work done by the magnetic field on the electron is zero. This is because the magnetic force is always perpendicular to the velocity of the electron, resulting in no displacement along the direction of the force, hence no work is done. For more visit here: https://www.tiwariacademy.com/ncert-soluRead more

    The work done by the magnetic field on the electron is zero. This is because the magnetic force is always perpendicular to the velocity of the electron, resulting in no displacement along the direction of the force, hence no work is done.

    For more visit here:
    https://www.tiwariacademy.com/ncert-solutions/class-12/physics/chapter-9/

    See less
    • 26
  3. For a simple microscope, when the object is at the lens's focus, the magnifying power ( M) is given by: M = 1 + D/f where D = 25cm (near point) and f = 5 cm. M = 1 + 25/5 = 6 Thus, the magnifying power is 6. For more visit here: https://www.tiwariacademy.com/ncert-solutions/class-12/physics/chapter-Read more

    For a simple microscope, when the object is at the lens’s focus, the magnifying power (
    M) is given by:

    M = 1 + D/f
    where D = 25cm (near point) and f = 5 cm.
    M = 1 + 25/5 = 6
    Thus, the magnifying power is 6.

    For more visit here:
    https://www.tiwariacademy.com/ncert-solutions/class-12/physics/chapter-9/

    See less
    • 25
  4. When the iron core is removed, the solenoid's inductance decreases, reducing opposition to current changes. However, in a d.c. circuit, inductance has minimal effect in steady state. The current remains the same, so the brightness of the bulb does not change. For more visit here: https://www.tiwariaRead more

    When the iron core is removed, the solenoid’s inductance decreases, reducing opposition to current changes. However, in a d.c. circuit, inductance has minimal effect in steady state. The current remains the same, so the brightness of the bulb does not change.

    For more visit here:
    https://www.tiwariacademy.com/ncert-solutions/class-12/physics/chapter-8/

    See less
    • 21
  5. As the object approaches the converging lens, the image moves away from the lens with increasing speed, remaining real, inverted, and diminished. When the object reaches the focus, the image forms at infinity. If the object stops at the focus, the image becomes highly magnified and theoretically forRead more

    As the object approaches the converging lens, the image moves away from the lens with increasing speed, remaining real, inverted, and diminished. When the object reaches the focus, the image forms at infinity. If the object stops at the focus, the image becomes highly magnified and theoretically forms at an infinite distance.

    For more visit here:
    https://www.tiwariacademy.com/ncert-solutions/class-12/physics/chapter-9/

    See less
    • 14