Here is the 1st Year Physics Chapter 1 Online Test. These tests not only help you learn, but they allow you to gain better grades. This online test is for those who would like to achieve full marks in their exams. It will be beneficial for you if you try all the online tests prior to your exam. Moreover, It won’t take you long to fall in love with these online tests if you just try them once.
(1) Modulus of $a+b i$ is:
(a) $\mathrm{a}^{2}+\mathrm{b}^{2}$
(b) $\sqrt{a^{2}+b^{2}}$
(c) $a^{2}-b^{2}$
(d) $\quad a-i b$
