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Kingdom of Saudi Arabia Ministry of Higher Education Majmaah University College of Engineering Department: Electrical Engineering Exam Information Course code: Instructor: Section number: Exam time: Exam hall: Number of pages: First Exam EE 234 Course Title: Electromagnetics II Dr Yazeed Qasaymeh Exam date: 10 November 2014 From: 03:00 pm To: 05:00 pm 2D 021, 2D -22 4 Total score: 20 points Student’s Information Name: ID: Exam Instructions: Read the questions carefully and several times. Writing clearly will make it possible to assess your answers correctly. Any form of cheating, intention to cheating, or disruption of the exam will subject you to a disciplinary action as specified by the university’s regulations. Carrying or using the mobile phone during the exam is not allowed. Using the phone during the exam will carry a disciplinary action. The calculator is only permitted by the exam supervisor. No student can leave the exam room during the first half hour of the exam. Any student coming after the first half hour of the exam will not be permitted to enter the exam. A student leaving the exam, even for legitimate reasons, may not be given a makeup exam. Points Earned: Question 1 2 3 4 Score Total score in the exam: Dear student, we encourage you to answer the exam the best you can and we wish you all success. Q1) A conducting bar can slide freely over two conducting rails as shown in Figure shown. Calculate the induced voltage in the bar. (6pts) (a)If (b) the bar is stationed at y 8 cm and B 4cos(106 t ) az mWb / m 2 (2pts) If the bar slides at a velocity u 20ay m / s and B 4 az mWb / m 2 (2pts) (c)If the bar slides at a velocity u 20ay m / s and B 4cos(106 t y ) az mWb / m 2 . Use the third case of Faraday law (2pts) Q2) The electric field and magnetic field in free space are given by (5pts) E 50 H 50 cos(106 t z ) a V / m cos(106 t z ) a A / m (a) Express these in phasor form (2pts) (b) Determine the constants H o and such that the fields satisfy Maxwell's equations. Use time harmonic Maxwell equations.(3pts) Q3) If P 2sin(10t x / 4) a y and Q e jx (ax az )sin( y ) determine the phasor form of P and the instantaneous form ofQ . (4pts) Q4) A parallel-plate capacitor with plate area of 5 cm 2 and plate separation of 3 mm has a voltage 50sin(103t ) V applied to its plates. Calculate the displacement current assuming 2 0 (5pts)