How is the mode of a data set defined?
a. it is the middle value of the set.
b. it is the most common value in the set.
c. it is the average of the different values in the set.
d. it is the difference between the highest and lowest values of the set.

B.It is the most common value in the set.

Explanation:

The mode of a data set is the value that is repeated most times, that is, the one with the highest absolute frequency. If there are two values ​​of the variable that have the highest absolute frequency, there would be two modes. If no value is repeated, there is no mode.

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.