Directions: In the following questions, A statement of Assertion (A) is followed by a statement of Reason (R). Mark the correct choice as.Assertion (A): The basic difference between magnetic lines of force and electric lines of force is electric lines of force are discontinuous and magnetic lines of force are continuous.Reason (R): Magnetic lines of force exist in a magnet but no electric lines of force exists in a charged body.a)Both A and R are true and R is the correct explanation of Ab)Both A and R are true but R is NOT the correct explanation of Ac)A is true but R is falsed)A is false and R is trueCorrect answer is option 'A'. Can you explain this answer?

Question

Answer

Assertion (A): The basic difference between magnetic lines of force and electric lines of force is that electric lines of force are discontinuous and magnetic lines of force are continuous.
Reason (R): Magnetic lines of force exist in a magnet but no electric lines of force exist in a charged body.

Explanation:
Both the assertion and reason are given, and we need to determine if both are true and if the reason is the correct explanation of the assertion.

A. Explanation of Assertion (A):
Electric lines of force are discontinuous: Electric lines of force represent the electric field around a charged object. They originate from positive charges and terminate on negative charges. The electric field lines are continuous in the region between charges but are discontinuous at the charges themselves. This is because electric field lines cannot intersect each other, and the presence of a charge disrupts the continuity of the electric field lines.

Magnetic lines of force are continuous: Magnetic lines of force represent the magnetic field around a magnet or a current-carrying conductor. Unlike electric field lines, magnetic field lines form closed loops and do not have a start or end point. They are continuous and do not have any breaks or interruptions.

B. Explanation of Reason (R):
Magnetic lines of force exist in a magnet: Magnetic lines of force are associated with the magnetic field generated by a magnet. They form closed loops that emerge from the magnet's north pole and enter the south pole.

No electric lines of force exist in a charged body: Electric lines of force represent the electric field surrounding a charged object. They originate from positive charges and terminate on negative charges. In a charged body, the electric field lines do exist, but they are not visible or easily represented like magnetic field lines. The electric field lines are continuous in the region between charges, but they are not physically observable on the surface of the charged body.

Conclusion:
Both the assertion and reason are true. The reason correctly explains the assertion. Electric lines of force are discontinuous because they terminate on charges, while magnetic lines of force are continuous and form closed loops in a magnet.

Answer

Let us consider an electric dipole. The electric  lines of force exists outside only and not inside the dipole. Let us now consider a magnetic dipole. The magnetic lines of force exist outside as well as inside the dipole. So, it can be said that magnetic lines of force are continuous and electric lines of force are discontinuous. So assertion and reason both are true and reason explains the assertion too.

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