A) paramagnetic
B) diamagnetic
C) ferromagnetic
D) anti ferromagnetic
Correct Answer: B
Solution :
Some substances when placed in a magnetic field are feebly magnetised in the opposite direction of the magnetizing field. These substances, when brought close to a pole of a powerful magnet are repelled away from the magnet. The body of the frog behaves like a diamagnetic substance, hence the smallest magnetic field placed below the body of the frog will be strong enough to lift it.
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