Mass which type of quantity

mass is a scalar quantity

Explanation:

It can get confusing when the terms are used interchangeably. Another example is a mass and weight . Weight is a force which is a vector and has a magnitude and direction. mass is a scalar. Weight and mass related to one another, but they are not the same quantity

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.