31. Two charged particles, each of 2 x 10-C, are brought from infinity to a separation of 5 cm. Find the increase in electrical potential energy in the
process.

P = 72 J

Step-by-step explanation:

Given that,

Charges,

These charges are brought from infinity to a separation of 5 cm.

We need to find the increase in the electrical potential energy in the  process. The formula for the electric potential energy is given by :

So, the required electric potential energy is 72 J.

(d)

step-by-step explanation:

given: the line in the graph passes through points (5,30) and (6,26).

then, the equation of line is:

now, put y=a(n) and x=n,

hence, option d is correct.