A conducting sphere fo radius 10 cm has an unknown charge. If the electric field 20 cm from the center of the sphere is `1.5xx10^(3) N//C` and points radially inwards, what is the net charge on the sphere ?

Explanation

To solve the problem, we need to determine the net charge on a conducting sphere given the electric field at a point outside the sphere. Here’s the step-by-step solution:

### Step 1: Understand the Problem
We have a conducting sphere with a radius of 10 cm, and we need to find the charge on it. The electric field at a distance of 20 cm from the center of the sphere is given as \( E = 1.5 \times 10^3 \, \text{N/C} \) and it points radially inwards.

### Step 2: Use the Electric Field Formula
The electric field \( E \) due to a point charge \( Q \) at a distance \( r \) is given by the formula:
\[
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