Calculate the magnitude of the force between two electrons which are separated by a distance of $10^{- 10} m$ . If the magnitude of the charge is $10^{- 19} C$ and Coulomb constant is $10^{10} N m^{2} / C^{2}$ .

10^{- 8} N

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10^{- 28} N

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10^{- 38} N

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10^{- 48} N

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10^{- 58} N

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Solution

The correct option is A $10^{- 8} N$
Given : $Q = 10^{- 19} C$ $k = 10^{10}$ $r = 10^{- 10}$ m
Force between them $F = \frac{k Q^{2}}{r^{2}} = \frac{10^{10} \times 10^{- 19} \times 10^{- 19}}{(10^{- 10})^{2}} = 10^{- 8}$ N

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Calculate the magnitude of the force between two electrons which are separated by a distance of 10−10m. If the magnitude of the charge is 10−19C and Coulomb constant is 1010Nm2/C2.

The correct option is A 10−8NGiven : Q=10−19C k=1010 r=10−10 mForce between them F=kQ2r2=1010×10−19×10−19(10−10)2=10−8 N

Calculate the magnitude of the force between two electrons which are separated by a distance of $10^{- 10} m$ . If the magnitude of the charge is $10^{- 19} C$ and Coulomb constant is $10^{10} N m^{2} / C^{2}$ .

The correct option is A $10^{- 8} N$
Given : $Q = 10^{- 19} C$ $k = 10^{10}$ $r = 10^{- 10}$ m
Force between them $F = \frac{k Q^{2}}{r^{2}} = \frac{10^{10} \times 10^{- 19} \times 10^{- 19}}{(10^{- 10})^{2}} = 10^{- 8}$ N