100 POINTS A wire is coiled around an iron core, and a current runs through it to create an electromagnet. How would you INCREASE the power of the electromagnet?

Question 3 options:

Increase the voltage of the power source to create a higher current

Open a switch so that the current stops.

Replace the iron core with copper.

Make the wire straighter, so it wraps around the core fewer times

The answer to your question is A: Increase the voltage of the power source to create a higher current.

Explanation:

Hope that this helps!

explanation:

let the different atoms be x and y. each with four protons and same mass will be represented as follows.

mass number is number of protons + number of neutrons.

            and  

since, it is given that one has a negative charge while the other is neutral. therefore, there will be increase in number of protons and the atom will be represented as follows.

according to periodic table, mass number of beryllium is 9 and it has atomic number 4 so, the atoms will be and .  

the protons and neutrons will be located inside the nucleus whereas the electrons will be revolving around the nucleus.