WAEC - Physics (2008 - No. 33)
If the charge on an object is measured as 4.0 x 10-18C, how many excess electrons does the object possess, given that the charge of an electron is 1.6 x 10-18C
18
19
25
37
คำอธิบาย
\(\frac{4 \times 10^{-18}}{1.6 \times 10^{-19}} = 25\)