Physics
One should not connect a number of electrical appliances to the same power socket because

this can damage the electrical meter
the appliance will not get full voltage
this can damage the domestic wiring due to overloading
this can damage the appliances due to overloading

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Physics
In the process of magnetisation of a bar

The entire bulk of the bar gets magnetised
Only some parts of the outer layers of the bar get magnetised
Only the ends of the bar get magnetised
Only the surface of the bar gets magnetised

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