What is the purpose of the metal core in an electromagnet? it is magnetized and induces a current in the solenoid to decrease the magnetic field strength. it is magnetized and induces a current in the solenoid to increase the magnetic field strength. it is magnetized by the field of the solenoid and increases the magnetic field strength. it is magnetized by the field of the solenoid and decreases the magnetic field strength

It is magnetized by the field of the solenoid and increases the magnetic field strength.

Explanation:

The metal core is usually made of iron in an electromagnet. When electric current passes through the wire wound about the core, the the metal core gets magnetized and concentrates the field lines; thus increases the magnetic field strength.

Hence, the purpose of the metal core in an electromagnet is that it increases the magnetic field strength on being magnetized by the field of solenoid.

true tan speed = ang vel x radius

blue light is scattered in different directions by the tiny molecules of air. blue is scattered more than other colours because it has a shorter distance to travel which results in smaller waves. this is why we see a blue sky most of the time.