The second law of thermodynamics states that the state of entropy of the entire universe, as an isolated system, will always increase over time. The second law also states that the changes in the entropy in the universe can never be negative.
Magnetic field is proportional to NIA.
N is the number of turns, I is the current and A is the area
You see N=2n, I = 3 i. Therefore, it will 6 times stronger
200*6= 1200 kg. It can lift now is 1200 kg.
Answer:

Explanation:
Since there's no external force beside gravity acting on the rod, we can use the law of energy conservation to calculate for the speed of rod center of gravity before hitting the surface.
Also as the rod is uniform and this, its center of gravity is at distance h/2 from the surface.



