Question 2.39 In Milikan’s experiment, static electric charge on the oil drops has been obtained by shining X-rays. If the static electric charge on the oil drop is –1.282 × 10–18C, calculate the number of electrons present on it.
Class XI Structure of Atom Page 67
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Charge carried by the oil drop = 1.282 ×10–18C
Charge carried by one electron = 1.6022 × 10–19C
∴electrons present on the oil drop carrying 1.282x10-18C charge
......see the file.....
Charge carried by the oil drop = 1.282 ×10–18C
Charge carried by one electron = 1.6022 × 10–19C
∴electrons present on the oil drop carrying 1.282x10-18C charge
......see the file.....
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In Milliken's oil drop experiment ,
the static electric charge on the oil drop is -1.282 × 10^-18 C.
but charge of 1 electrons = -1.602 × 10^-19 C
so, we have to find the number of electrons present on it .
use formula ,
number of electrons = Total static electric charge on oil drop / charge of 1 electrons
= -1.282 × 10^-18 C/ -1.602 × 10^-19
= 8 electrons .
hence, 8 electrons present on it.
the static electric charge on the oil drop is -1.282 × 10^-18 C.
but charge of 1 electrons = -1.602 × 10^-19 C
so, we have to find the number of electrons present on it .
use formula ,
number of electrons = Total static electric charge on oil drop / charge of 1 electrons
= -1.282 × 10^-18 C/ -1.602 × 10^-19
= 8 electrons .
hence, 8 electrons present on it.
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