Question

Ch - Fun with MAGNETS
Pick the odd one out according to magnets:
1) ATM card, MRI machine, Speakers, Bulbs
2) Magnetite, Nickel, Iron, Cobalt.
Pls answer...
It's urgent..

Answer 1

Here are the answers
1) Bulbs don't contain any type of magnet whereas ATM cards have magnetic strip, MRI machine uses powerful electromagnet for scanning and there are magnets in speakers

2) Magnetite is a ferrimagnetic metal whereas iron, nickel and cobalt are ferromagnetic metals

Answer 2

1. Odd one Out : Bulb

2. Odd one Out: Magnetite

1. Reason: Bulb contain only Tungsten filament and inert gases.

Magnetic strips are attached in the ATM card for the transaction of money.

MRI machine uses high electro magnets for scanning huge elements.

Speakers usually use strong magnets.

2. Reason: Magnetite ( Ferrous - Ferric oxide) It contains only iron particles.

Iron, cobalt and nickel are magnetic alloys.