Question

Which of the following cannot be the charge on a particle ?

–3.2 × 10–19 C

4.8 × 10–19 C

1.2 × 10–19 C

1.6 × 10–19 C

Answer 1

Answer:

-3.2 × 10–19 C

Explanation:

reason!...The Possible values of electric charge are q = ± 1e; ± 2e; ± 3e... Charge less than the charge on an electron (i.e. e = 1.6 * 10-19 C) is not possible. Hence, B C & D are not possible.

Answer 2

The charge on the particle cannot be $1.2*10^{-19} C$

• We know that charge on particle is an integral multiple of  $1.6*10^{-19} C$.
• it can be postive or negative however the magnitude of charge cannot be a fraction number.
• If we divide the first option by $1.6*10^{-19} C$ it will give -2.
• Likewise this is true for option two which gives 3 and option four which gives 1
• In case of the third option dividing by $1.6*10^{-19} C$ gives .75 which is a fraction number.
• So option three $1.2*10^{-19} C$ is the answer of the question.

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