Diamagnetic materials get magnetised in a direction ______ to the external magnetic field.
Diamagnetic materials get magnetised in a direction opposite to the external magnetic field. Hence, diamagnetic materials get repelled by a magnet.
Material A gets magnetised under the influence of external magnetic field while material B does not get magnetised. Material A retains the acquired magnetism for a long time. Material C magnetises under the influence of a magnetic field and does not retain it for a long time. Which of them is the most suitable to make electromagnets?