Exams › JEE Main › Physics

Given below are two statements : one is labelled as Assertion (A) and the other is labelled as Reason (R). Assertion (A) : Magnetic monopoles do not exist. Reason (R) : Magnetic field lines are continuous and form closed loops. In the light of the above statements, choose the most appropriate answer from the options given below :

1. (A) is not correct but (R) is correct
2. (A) is correct but (R) is not correct
3. Both (A) and (R) are correct but (R) is not the correct explanation of (A)
4. Both (A) and (R) are correct and (R) is the correct explanation of (A)

Correct answer: Both (A) and (R) are correct and (R) is the correct explanation of (A)

Solution

The assertion that magnetic monopoles do not exist is supported by the reason that magnetic field lines are continuous and form closed loops, which implies that magnetic poles always come in pairs. Therefore, both statements are correct, and the reason accurately explains the assertion.

Related JEE Main Physics questions

• The SI unit weber is used for measuring which of the following quantities?
• Two identical magnetic dipoles, each having magnetic moment $1.0\ \text{A·m}^2$, are kept 2 m apart with their axes mutually perpendicular. The magnetic field at the midpoint between them is
• A material has relative permittivity $\varepsilon_r$ and relative permeability $\mu_r$. For a diamagnetic substance, which pair of values is physically permissible?
• A bar magnet freely suspended in the horizontal component of Earth’s magnetic field $H$ has a time period of 4 s. If a second magnet is placed nearby and the time period becomes 2 s, then the magnetic field produced by the second magnet is:
• A magnetic compass needle has a magnetic moment of 60 A·m² and is aligned along the geographical north at a certain location. If the torque acting on it is $1.2\times10^{-3}$ N·m and the horizontal component of Earth’s magnetic field at that place is 40 microtesla, what is the dip angle there?
• Which magnetic properties should the core material possess to be suitable for an electromagnet?

⚔️ Practice JEE Main Physics free + battle 1v1 →