When magnetic field lines are close, the magnetic field is?

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Jasmine Grover

Education Journalist | Study Abroad Lead

Magnetic field lines are used to visualize and represent the direction and strength of the magnetic field in a given region of space.

  • The closer the field lines are to each other, the stronger the magnetic field is in that region.
  • This is because the density of magnetic field lines represents the strength of the magnetic field.
  • If the field lines are close together, it means that the magnetic field is changing rapidly, and there is a large magnetic force acting in the region.
  • In contrast, if the field lines are far apart, the magnetic field is weaker because there is less force acting in that region.
Magnetic field lines

In other words, the magnetic field lines behave like a map that tells us about the strength and direction of the magnetic field. When the field lines are close together, they indicate that the magnetic field is strong, and when they are far apart, they indicate that the magnetic field is weak. Therefore, the density of the magnetic field lines provides a visual representation of the strength of the magnetic field.

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CBSE CLASS XII Related Questions

  • 1.
    A charged particle $+q$ in an electric field $\vec{E}$ experiences a force in the direction of the electric field. As a result, its kinetic energy changes. Similarly, the charged particle also experiences a force when it moves in a magnetic field $\vec{B}$. But this magnetic force is perpendicular to both velocity $\vec{v}$ of the charged particle and the magnetic field $\vec{B}$, so it cannot change the kinetic energy of the charged particle. Consider two charged particles 1 and 2 of masses $m$ and $\frac{m}{2}$ having charges $-q$ and $+2q$ respectively. They are accelerated from rest through the same potential difference $V$ and acquire kinetic energy $K_1$ and $K_2$. Then they enter in a region of uniform magnetic field $\vec{B}$ perpendicular to their velocities.


      • 2.
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          • 3.
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              • 4.
                This ‘average velocity’ is found be few mm/s for currents in range of a few amperes. How then is current established almost the instant a circuit is closed ?


                  • 5.
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                      • 6.
                        Write two advantages of reflecting telescope over refracting telescope.

                          CBSE CLASS XII Previous Year Papers

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