Science [1 Mark Questions]

The strip on the back of a credit card / debit card is a magnetic strip, often called mag-stripe.

An extremely powerful electromagnet is used in Mangle train.

The line joining the magnetic poles is called the magnetic axis.

ALNICO. (An alloy of aluminium, nickel and cobalt)

Neodymium magnets.

The diameter of the magnetar is 20 km.

Artificial magnets are produced by stroking a magnetic material with magnetite or with other artificial magnets.

Aluminium, Platinum, Chromium, Oxygen and Manganese.

1 tesla = 10,000 gauss.

Magnetite. (Iron oxide)

It is not advisable to slide a magnet on an iron bar back and forth because moving it in opposite directions will work to cancel each other out.

Earth is not attracting other ferromagnetic materials because the magnetic character of ferromagnetic materials is affected by the external temperature. When they are heated, they become paramagnetic at curie temperature.

The space around a magnet in which its magnetic effect or influence is observed.