Question

Kayla has two magnets. She would like to know how much magnetic energy is stored in each one. What would be the best way for her to determine which magnet has the most magnetic energy?

a
Record the mass of each magnet by measuring it on a balance scale.
b
Attach wires to the ends of each magnet and measure the currents going through the wires.
c
Put each magnet into a beaker of water to see how much water it displaces.
d
Measure how close each magnet can get to a metal object before picking it up.

Answer 1

b
Attach wires to the ends of each magnet and measure the currents going through the wires. By applying a current to the magnets, she can measure the strength of their magnetic fields and determine which one has more magnetic energy stored in it.