What Greek letter represents Delta in electrical engineering?

In electrical engineering, the Greek letter that represents Delta is the symbol ∆. Delta is commonly used to signify a change in a variable or quantity, such as voltage (ΔV) or current (ΔI). It is also frequently employed in circuit diagrams to represent configurations such as the Delta connection in three-phase systems. This configuration plays a crucial role in understanding how electrical power systems operate.

The other choices do not represent Delta. For instance, the symbol Φ (Phi) is often associated with magnetic flux, Θ (Theta) is used for various angles in electrical contexts, and Σ (Sigma) typically denotes summation in equations. Understanding these symbols and their meanings is essential for interpreting electrical concepts and communications accurately.