Question

adding more turns to the wire coil increases,decreases the strength of an electromagnet

Answer 1

The magnetic field created by an electromagnet is directly proportional to the number of turns in the winding N
\[NI=BL/μ\]
so increasing the turns N ,B is increased,the magnetic field

the force exerted by an electromagnet is
\[F=B ^{2}A/2μ0\]
so the force of the electromagnet is increased as well,as B is increased