Find the absolute and percent errors in a measurement of the boiling point of bromine if the laboratory figure is 51.2°c and the actual value is 59.35°c.

6 cos 34, 6 sin 34 trig

the answer is the first electromagnet (a). this is because it has more coils around the ferromagnetic material. increasing the number of coils increases the surface area in which the metal interacts with the current in the coil. this enables more atoms in the metal to become aligned hence becoming more magnetized.