CUET Preparation Today
Which of the following statements is correct? |
materials exhibiting Meissner effect are diamagnetic and have $X=-1$ and $μ_r= 0$. Materials that get weakly magnetised when placed in an external magnetic field and have $X>-1$ and $μ_r> 0$ are called ferromagnetic materials. At high enough temperature, a paramagnet becomes a ferro magnet and gets strongly magnetised. Super conductors are the ferromagnetic materials that are strongly repelled in an external magnetic field. |
materials exhibiting Meissner effect are diamagnetic and have $X=-1$ and $μ_r= 0$. |
The correct answer is Option (1) - materials exhibiting Meissner effect are diamagnetic and have $X=-1$ and $μ_r= 0$. Materials exhibiting the meisner effect are perfect diamagnets and have $X=-1$ which indicates that the material generates an internal magnetic field that exactly cancels the applied external electric field. and, $μ_r=1+X$ $=1-1=0$ |
