Four Point Charges Are Individually Brought from Infinity and Placed

question 48

Multiple Choice

Four point charges are individually brought from infinity and placed at the corners of a square as shown in the figure. Each charge has the identical value +Q. The length of the diagonal of the square is 2a.
-What is the magnitude of the electric field at P, the center of the square?

• A)kQ/a²
• B)2kQ/a²
• C)4kQ/a²
• D)kQ/4a²
• E)zero V/m

---

Definitions:

Ordinal Data

Data that can be categorized or ranked in order but does not quantitatively measure differences between categories.

Normally Distributed Populations

Populations that follow a normal distribution, characterized by a bell-shaped curve.

Z-Test Approximation

A statistical test used to determine if there are significant differences between means with known variance and a large sample size.

Two Independent Samples

A statistical method involving the comparison of two groups of data where the samples are collected independently of one another.