To correctly answer this question about the properties of paramagnetic substances, let's break down each statement:
Based on the above analysis, statements A and C are correct. Therefore, the most appropriate answer is A, C Only.
Paramagnetic substances exhibit the following characteristics:
Align themselves along the direction of an external magnetic field due to unpaired electrons.
Are weakly attracted to an external magnetic field.
Possess a magnetic susceptibility \( \chi > 0 \), but it is small and positive.
Do not move from strong to weak fields (this is a property of diamagnetic substances).
Final Answer: A, C only
| Group-I | Group-II | ||
| P | Magnetic | 1 | Chargeability |
| Q | Gravity | 2 | Electrical conductivity |
| R | Magnetotelluric | 3 | Susceptibility |
| S | Induced Polarization | 4 | Density |
Let \( \alpha = \dfrac{-1 + i\sqrt{3}}{2} \) and \( \beta = \dfrac{-1 - i\sqrt{3}}{2} \), where \( i = \sqrt{-1} \). If
\[ (7 - 7\alpha + 9\beta)^{20} + (9 + 7\alpha - 7\beta)^{20} + (-7 + 9\alpha + 7\beta)^{20} + (14 + 7\alpha + 7\beta)^{20} = m^{10}, \] then the value of \( m \) is ___________.