What is the purpose of the metal core in an electromagnet?

It is used to increase the magnetic field intensity produce by the electromagnet

Explanation:

As we know that the magnetic field produced by the electromagnet is given by the formula

here we know that

= permeability of the free space

n = number of turns per unit length

i = electric current

so here we can say that if the permeability of medium is increased then the intensity of magnetic field will also increase

So we can use metal core to increase the field intensity produced by electromagnet

f=ma newton's second law 7x8=56n

gpe = mass x gravity constant x height or… gpe = mgh

where… mass: measured in kilograms (kg)

gravity: gravity constant on earth = 10.00 m/s2

height: measured in meters (m)

gpe: measured in joules (j) or kilojoules (kj)

how do you solve gpe?

gravitational potential energy (gpe) is the energy an object has because of its position above the. ground.

gpe = mass x gravity constant x height or… gpe = mgh.

mass:

note: to earn full marks when solving science word problems, you must show your work:

formula.

example:

given values:

mass = 0.3 kg.