Question

State Coulomb's law? The force between two point charges q1 and 92 separated by a
distance of 10 cm in vacuum is 18N. Calculate the force between the same two charges if
they are separated by 15 cm.​

Answer 1

Answer:

coulomb's law states that the force of attraction between point charges is directly proportional to product of charges and square of distance

mathematically;

f=1/4πε q1q2/r^2; this can be modified as kq1q2/r^2,the value of k=9×10⁹

ε-permittivity of free space ,value:8.8×10⁻¹²

Explanation:

given,

f=18N

r=10cm

by using formula we get,

18=kq1q2/(10)²

kq1q2=1800 let it be eqn 1

f=kq1q2/r^2

=1800/(15)² [from eqn 1]

f=8N

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