Question

1)
O
B 3 cm
+2 μC
Figure 1
5 cm
A -2μC 4 cm
There are two charged spheres are located like shown in figure above. Coulomb’s constant

Answer 1

As per the question,

It is incomplete question, so i am taking assumption that here we have to find the force

Let there is two charged sphere A and B, and distance between OA is =5cm

distance between OB=4cm and AB = 3cm

Charge on A is $=-2\mu C$

Charge on B is $=2\mu C$

force between two charges is $(F)=\frac{q_1 q_2}{4\pi \epsilon_o r^2}$

Now, substituting the values,

$\Rightarrow F=-\frac{9\times 10^{9}\times2\times 2}{(3\times 10^{-2})^2}N$

$\Rightarrow F=-4\times 10^{-13}N$

Here negative sign indicates that the force between these two charges is attraction force.