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 light copper ring is freely suspended by a light string. A bar magnet is held horizontally with its length along the axis of the ring. The magnet is moved towards the ring with its N pole facing the loop. What will happen to the ring and its position? Explain.


      • 2.
        Two heaters rated as \((P_1,V)\) and \((P_2,V)\) are connected in series across a dc source of \(V/2\) volt. The power consumed by the combination will be –

          • \((P_1+P_2)\)
          • \(\dfrac{P_1+P_2}{2}\)
          • \(\dfrac{P_1P_2}{2(P_1+P_2)}\)
          • \(\dfrac{P_1P_2}{4(P_1+P_2)}\)

        • 3.
          Assertion (A) : All atoms have a net magnetic moment. Reason (R) : A current loop does not always behave as a magnetic dipole.

            • Both Assertion (A) and Reason (R) are true and Reason (R) is the correct explanation of the Assertion (A).
            • Both Assertion (A) and Reason (R) are true, but Reason (R) is not the correct explanation of the Assertion (A).
            • Assertion (A) is true, but Reason (R) is false.
            • Both Assertion (A) and Reason (R) are false.

          • 4.
            Write any two features of nuclear forces.


              • 5.
                Photoemission of electrons occurs from a metal (\( \phi_0 = 1.96 \, \text{eV} \)) when light of frequency \( 6.4 \times 10^{14} \, \text{Hz} \) is incident on it. Calculate: Energy of a photon in the incident light, The maximum kinetic energy of the emitted electrons, and The stopping potential.


                  • 6.
                    Two parallel plate capacitors X and Y are connected in series to a 6 V battery. They have the same plate area and same plate separation but capacitor X has air between its plates, whereas capacitor Y contains a material of dielectric constant 4. Calculate the capacitances of X and Y, if the equivalent capacitance of the combination of X and Y is \( 4 \, \mu\text{F} \). Calculate the potential difference across the plates of X and Y.

                      CBSE CLASS XII Previous Year Papers

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