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

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Jasmine Grover

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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 rectangular loop of size 5 cm $\times$ 8 cm is lying in the $x$-$y$ plane in a uniform magnetic field $\vec{B} = (2.0\ \text{T})\hat{k}$. The total magnetic flux linked with the loop is:

      • 80 Wb
      • 16 Wb
      • \(8 \times 10^{-2}\) Wb
      • \(8 \times 10^{-3}\) Wb

    • 2.

      A ray of light MN is incident normally on the face corresponding with side AB of a prism with an isosceles right-angled triangular base ABC. Trace the path of the ray as it passes through the prism when the refractive index of the prism material is (i) $\sqrt{2}$, and (ii) $\sqrt{3}$.


        • 3.
          Two point charges -Q and Q are located at points (d, 0) and (0, d) respectively, in x-y plane. The electric field E at the origin will be:

            • \(\frac{1}{4\pi\epsilon_0} \frac{\sqrt{2}Q}{d^2} (\hat{i} - \hat{j})\)
            • \(\frac{1}{4\pi\epsilon_0} \frac{\sqrt{2}Q}{d^2} (-\hat{i} - \hat{j})\)
            • \(\frac{1}{4\pi\epsilon_0} \frac{Q}{d^2} (\hat{i} - \hat{j})\)
            • \(\frac{1}{4\pi\epsilon_0} \frac{Q}{d^2} (-\hat{i} - \hat{j})\)

          • 4.
            Consider the nuclear reaction \( X \to Y + Z \). Let \( M_x \), \( M_y \), and \( M_z \) be the masses of the three nuclei X, Y, and Z respectively. Then which of the following relations hold true?

              • \( (M_x - M_z)<M_y \)
              • \( (M_x - M_y)<M_z \)
              • \( M_x>(M_y + M_z) \)
              • \( M_x<(M_y + M_z) \)

            • 5.
              Determine the current in the \( 3 \, \Omega \) branch of a Wheatstone Bridge in the circuit shown in the figure.


                • 6.
                  The resistance of a metal wire at \(20^\circ\text{C}\) is \(1.05\,\Omega\) and at \(100^\circ\text{C}\) is \(1.38\,\Omega\). Determine the temperature coefficient of resistivity of this metal.

                    CBSE CLASS XII Previous Year Papers

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