Answer: True
Explanation: Following are the properties that are used to identify minerals:
(1) Color
(2) Hardness
(3) Magnetism : It is the property of mineral to attract or repel with other magnetic materials.
(4) Luster : It is the property that shows the surface is reflecting light or not.
(5) Reactivity: Reactivity is also responsible to identify mineral. How the mineral is reacting with acids, bases etc helps to identify type of minerals.
F~1/r²
doubling the distance r, Decreases the force by ¼
Answer: the object transferred some of its energy to its surroundings.
Explanation:
Answer
given,
Two solenoids A and B
Number of turn
Na = 430 turns Nb = 610 turns
Current = 2.80 A
Average flux through A = 300 μWb
Average of flux through B = 90.0 μ
Wb
a) ![L = \dfrac{N \phi}{I}](https://tex.z-dn.net/?f=L%20%3D%20%5Cdfrac%7BN%20%5Cphi%7D%7BI%7D)
![L = \dfrac{610\times 90 \times 10^{-6}}{2.80}](https://tex.z-dn.net/?f=L%20%3D%20%5Cdfrac%7B610%5Ctimes%2090%20%5Ctimes%2010%5E%7B-6%7D%7D%7B2.80%7D)
![L =19.6 mH](https://tex.z-dn.net/?f=L%20%3D19.6%20mH)
b) inductance of A
![L = \dfrac{N_A \phi_A}{I_A}](https://tex.z-dn.net/?f=L%20%3D%20%5Cdfrac%7BN_A%20%5Cphi_A%7D%7BI_A%7D)
![L = \dfrac{430\times 300 \times 10^{-6}}{2.80}](https://tex.z-dn.net/?f=L%20%3D%20%5Cdfrac%7B430%5Ctimes%20300%20%5Ctimes%2010%5E%7B-6%7D%7D%7B2.80%7D)
![L =46 mH](https://tex.z-dn.net/?f=L%20%3D46%20mH)
c) magnitude of the emf
![\epsilon_B = -L_B\dfrac{dI}{dT}](https://tex.z-dn.net/?f=%5Cepsilon_B%20%3D%20-L_B%5Cdfrac%7BdI%7D%7BdT%7D)
![\epsilon_B = -(19.6\times 10^{-3})(0.5)](https://tex.z-dn.net/?f=%5Cepsilon_B%20%3D%20-%2819.6%5Ctimes%2010%5E%7B-3%7D%29%280.5%29)
![\epsilon_B = -9.8\times 10^{-3}\ V](https://tex.z-dn.net/?f=%5Cepsilon_B%20%3D%20-9.8%5Ctimes%2010%5E%7B-3%7D%5C%20V)
![\epsilon_B = -9.8\ mV](https://tex.z-dn.net/?f=%5Cepsilon_B%20%3D%20-9.8%5C%20mV)