A circular loop of radius r is carrying current . The ratio of the magnetic field at the center of circular loop and at a distance
from the center of the loop on its axis is:
Option: 1
Option: 2
Option: 3
Option: 4
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5 g of Na2SO4 was dissolved in x g of H2O. The change in freezing point was found to be 3.820C. If Na2SO4 is 81.5% ionised, the value of x (K
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