TBN11
contestada

A table has several directional compasses, several lengths of wire, a battery, an ammeter, a light bulb, a battery holder and a rubber eraser.
A student is asked to create an electric motor. Looking at the materials provided, what other materials would they need?
A) An armature
B) An iron nail.
C) A permanent magnet
D) an electric generator.

Respuesta :

Xnsb
I would say answer "a" BUT an armature is the rotating coil or coils of a dynamo or electric motor and if the student already has coils, that wouldn't be the answer. So A is eliminated. 

Now answer "b" sounds right because the student could then create their own armature with a nail and wire... So B is a possible answer choice.

answer "c" is a possibility because an armature is useless without a magnet... so C is a possible choice

and finally "d" if you have batteries, why do you need a generator? what purpose does it serve? D is eliminated.

so the answer is C 
kmr0411067

Answer: c

Explanation: I took the test on USA

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