Which of the following would decrease the strength of an electromagnet? check all that apply

a.) straightening the wire

b.) increasing the current flow

c.) decreasing the voltage

d.) decreasing the resistance

e.) increasing the number of loops of wire

Answer:

The correct answer is:

A. straightening the wire, because the number of turns of the wire around the iron core is directly proportional with  the strength of electromagnet.

and,

C. decreasing the voltage is correct, by decreasing the voltage, the current will decrease and this leads to weaker electromagnet.

Explanation:

Simply, the electromagnet is used to convert electric energy to magnetic energy.

Basic idea:

The basic idea of the electromagnet is, when the electric current passes through a wire it creates a weak magnetic field

Components of simple electromagnet:

Battery: source of electricityElectric wire: the electric current passes through itIron core: will convert to temporary magnet

The strength of electromagnet is simply defined by the strength of magnetic field that synthesized by the electric current.

Factors affects strength of electromagnet:

Strength of current: by increasing the current that passes through the wire the magnetic field will increase, ( so decreasing the voltage will decrease the current produced and will decrease the strength of electromagnet)Number of loops or number of turns of the wire: the more the number of turns, the more the electric field produced, (so straightening the wire will decrease the magnetic field induced and decrease the strength of electromagnet).The metal core: iron core makes stronger electromagnet.Decreasing the resistance: this will increase the current produced and will increase strength of electromagnet.

Learn more about:

Factors affects strength of electromagnet:  Ohm's low:  

         

Keywords:

Electromagnet\ electric\ current\ induction\  field \ factors \ strength\ straight\ voltage.

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