Discussion:

The given statement is “One millivolt is one millionth of a volt”.

Refer to Table 1.2 in the textbook for SI prefixes. From the table, it is clear that one millivolt is equivalent to 10−3 V. Therefore, write the expression as follows:

1 mV=10−3 V=11000 V

Therefore, one millivolt is equivalent to one thousandth of a volt. Hence, option (b) is correct.

Conclusion:

Thus, the given statement is “(b) False”.