Question

Which of the following values is the possible amount of free charges? could be more than one choices 3.20 x 10^(-20) coulombs 3.20 x 10^(-19) coulombs 1.38 x 10 (-23) coulombs 1.6 x 10(-12) coulombs 6.63 x 10A(-34) coulombs

Answer 1

Correct options are second and fourth

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Building blocks of matter are atoms, which consists of nucleus and electrons. It has been observed that the electric charge of all particles are integral multiple of an elemental value of charge. This is known as charge quantization q = plusminus n Vertical-bar e Vertical-bar here n is integer e = 1.602 times 10^-19 (A) 3.20 times 10^-20 0 = n(1.602 times 10^-19)c implies n = 0.2(not possible) because w is not an integer (B) 3.2 times 10^-19 c = n(1.602 times 10^-19)c implies n = 2(possible) (c) 1.38 times 10^-23 c = n(1.602 times 10^-19)c implies n = 0.86 times 10^-4(not possible) (d) 1.6 times 10^-12 c = n(1.602 times 10^-19) n = 10 times 10^6(possible) (e) 6.63 times 10^-34 c = n(1.602 times 10^-19)c n = 4.14 times 10^-15 (not possible) so the correct option are (b) and (d)

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