Pakistan's best MCQs practice hub — FPSC · PPSC · CSS · NTS · Other Exams
Login

The surge impedance of an underground cable is significantly lower than overhead lines, usually around:

A40 to 50 ohms
B5 to 10 ohms
C1000 ohms
D400 to 500 ohms

Explanation

Underground cables have high capacitance because conductors are close together and dielectric constant is higher, reducing surge impedance Z_c = sqrt(L/C) to 40-50 ohms.

Submitted by: mcqstutor Team More Electrical Engineering MCQs →

No Comments

Leave a comment

Your email address will not be published. Required fields are marked *