Magnetism and Electromagnetism
In a simple magnetic field the strength of magnet flux

increases continuously from initial value to final value
decreases continuously from initial value to final value
is constant and has same value in energy part of the magnetic field
first increases and then decreases till it becomes zero

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Magnetism and Electromagnetism
A permanent magnet

Attracts some substances and repels others
Attracts ferromagnetic substances and repels all others
Attracts all paramagnetic substances and repels others
Attracts only ferromagnetic substances

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