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 one focus of the hyperbola $ \frac{x^2}{a^2} - \frac{y^2}{b^2} = 1 $ be at $ (\sqrt{10}, 0) $, and the corresponding directrix be $ x = \frac{\sqrt{10}}{2} $. If $ e $ and $ l $ are the eccentricity and the latus rectum respectively, then $ 9(e^2 + l) $ is equal to:
Let $ P_n = \alpha^n + \beta^n $, $ n \in \mathbb{N} $. If $ P_{10} = 123,\ P_9 = 76,\ P_8 = 47 $ and $ P_1 = 1 $, then the quadratic equation having roots $ \alpha $ and $ \frac{1}{\beta} $ is: