NivaarExam PrepOfficial exam papers ↗

04-BS-9: May 2015

Nivaar worked solution (AI-drafted; not reviewed by a licensed engineer)

  1. Question 1 Electric Field on a Corner Electron of a Charged Square
  2. Question 2 Electric Field at the Surface of a Charged Electron Beam
  3. Question 3 On-Axis B Field of a Horizontal Current Loop
  4. Question 4 B Field Between Two Antiparallel Current Sheets
  5. Question 5 Maximum and Minimum EMF of a Shrinking Loop
  6. Question 6 Electric Field in a Capacitor from Stored Energy
  7. Question 7 Mutual Inductance of Two Coaxial Loops of Very Different Size
  8. Question 8 Mirror Location and Time Delay for a Reflected Light Pulse

Start with Question 1 →

National Exams — May 2015 — 04-BS-9 Basic Electromagnetics. Three-hour, closed-book exam (approved Casio/Sharp calculator only). Aids given: $\varepsilon_0=8.85\times10^{-12}$ F/m, $\mu_0=4\pi\times10^{-7}$ H/m, $e=1.6\times10^{-19}$ C. Format: eight questions offered; any five constitute a complete paper and only the first five appearing in the answer book are marked. All eight are solved below for completeness.

Reference texts: Sadiku, Elements of Electromagnetics / Hayt & Buck, Engineering Electromagnetics — Coulomb's law and superposition, Gauss's law, Biot–Savart law, magnetic field of current sheets, Faraday's law, capacitance and field energy, mutual inductance; Young & Freedman, University Physics with Modern Physics — light propagation and reflection geometry.