Two point charges he on the x axis. A charge of +6.2 μC is at the origin, and a charge of −9.5 μCis at x = 10.0 cm. What is the net electric field at (a) x = −4.0 cm and at (b) x = +4.0 cm?

Solution 45P

Step 1 of 4</p>

(a)

Here we need to calculate the net electric field at a point if a charge is placed at and another charge at .

Given data,

Constant,

Charge,

Distance of charge 1,

Charge,

Distance of charge 2,

Given problem pictorially can be represented as shown below,

Step 2 of 4</p>

The net force at is given by,

Using electric field equation,

Substituting ,, , and

Therefore, the net electric field at a distance of -4cm is .