Athin copper rod 1.0 m long has a mass of 0.050 kg and is in a magnetic field of 0.10 t. what minimum current in the rod is needed in order for the magnetic force to balance the weight of the rod?

Explanation:

Force on a current carrying rod due to magnetic field is given as

here we know that

current in the rod

now magnetic force is balanced by the weight of the rod

so we will have

the earths atmosphere is made up of nitrogen and oxygen. solids can turn into gasses through a process called sublimation. sublimation is the transition of a substance directly from the solid to the gas phase, without passing through the intermediate liquid phase.

hope this : d