Question

A frog can be levitated in a magnetic field produced by a current in a vertical solenoid placed below the frog. This is possible because the body of the frog behaves as
A. Paramagnetic
B. Diamagnetic
C. Ferromagnetic
D. Anti-ferromagnetic

Answer 1

Hint:In this question it is given that the frog can be alleviated in the magnetic field which is produced by a current in a vertical solenoid placed below the frog. And this phenomenon is possible because we have to explain that this is possible because the body of the frog behaves as what kind of magnetic material it is.

Complete step-by-step answer:
The frog can be laviating in the magnetic field which is produced by a current in a vertical solenoid.

To levitate a body, a force must be applied on it which at least balances the body’s weight will always pull the frog down, it must act in the upward direction. Thus, the frog is repelled by the magnetic field.

Diamagnetic substances are only substances which are repelled by a magnetic field. This shows that the body of the frog behaves diamagnetically.

Note: Suppose we need to levitate a ball in air we need to apply a force here so it balances the weight of the object. $$Mg$$ always acts downward to in order to balance this you apply enough force to balance mg. In that case the object will be levitated and it will remain up in the air. Keep as long as in air as long as the force is applied. The force counters mg.