Charge Q Is Distributed Uniformly Throughout an Insulating Sphere of Radius

question 1

Multiple Choice

Charge Q is distributed uniformly throughout an insulating sphere of radius R.The magnitude of the electric field at a point R/2 from the center is:

• A)Q/4 \(\pi\) R²
• B)Q/ \(\pi\) R²
• C)3Q/4 \(\pi\) R²
• D)Q/8 \(\pi\) R²
• E)none of these