Charge Q is uniformly distributed along a thin, flexible rod of length L. The rod is then bent into the semicircle shown in the figure Center 1. Find an expression for the electric field E⃗ at the center of the semicircle. Hint: A small piece of arc length Δs spans a small angle Δθ=Δs /R, where R is the radius. Express your answer in terms of the variables Q, L, unit vectors i^, j^, and appropriate constants. 2.Evaluate the field strength if L = 16 cm and Q = 36 nC . Express your answer with the appropriate units.

Charge Q is uniformly distributed along a thin, flexible rod of length L. The rod is then bent into the semicircle shown in the figure Center 1. Find an expression for the electric field E⃗ at the center of the semicircle. Hint: A small piece of arc length Δs spans a small angle Δθ=Δs /R, where R is the radius. Express your answer in terms of the variables Q, L, unit vectors i^, j^, and appropriate constants. 2.Evaluate the field strength if L = 16 cm and Q = 36 nC . Express your answer with the appropriate units.