Which actions increase the strength of an electromagnet? 1-increase the number of coils and increase the strength of the current. 2-increase the number of coils and decrease the strength of the current 3- decrease the number of coils and increase the strength of the current. 4- decrease the number of coils and decrease the strength of the current.

The correct answer option is 1-Increase the number of coils and increase the strength of the current.

Step-by-step explanation:

An electromagnet is a soft metal core which is made into a magnet by passing the electric current through a coil surrounding it.

Unlike a permanent magnet, the strength of an electromagnet can be changed and there are several ways to do it.

One of the (most common and easiest) way is to increase the strength of the current is to Increase the number of coils as the strength of the electromagnet is directly proportional to the number of coils around the solenoid.

alkaline metals are lithium, sodium, rubidium, potassium, cesium and francium.

alkali metals have electronegativity from 0.7 to 1, lowest in periodic table of elements, which means that alkali metals (i group in periodic table) has positive oxidation number in compounds.

electronegativity is a chemical property that describes the tendency of an atom to attract a shared pair of electrons towards itself.

alkaline metals (far left in main group) have lowest ionizations energy and easy remove valence electrons,

for example, potassium is the alkali metal and has a single valence electron in the outer electron shell.

electron configuration of potassium is: ₁₉k 1s²2s²2p⁶3s²3p⁶4s¹.

they can not exist alone in nature, because they are very reactive.