ENG3012 Engineering Science B AY 2021/22 Examination - Semester 2 B3. (a) Given the magnetic circuit below: Mean Path Le

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Eng3012 Engineering Science B Ay 2021 22 Examination Semester 2 B3 A Given The Magnetic Circuit Below Mean Path Le 1 (31.56 KiB) Viewed 31 times

ENG3012 Engineering Science B AY 2021/22 Examination - Semester 2 B3. (a) Given the magnetic circuit below: Mean Path Length P= 40 cm 12A Cross-Sectional Area A-12 cm 250 turns coil (3 marks) (3 marks) Fig. B4(a) (1) Determine the magnetomotive force (MMF) produced by the coil; (ii) Calculate the average magnetic field strength (H) in the ring: (iii) If the relative magnetic permeability (w) of the ring material is 1200, find the average magnetic flux density (B) in the ring. Given xo - 41 x 10-Hm. (iv) Determine the total flux () in the ring; (b) A circuit consists of one ideal rectifier diode and a transformer is shown in Fig B4(b). Determine: 15:1 DI (3 marks) (2 marks) GA Vari Vsec 25V rms RL } "IVAL TX1 Fig. B4(b) the peak voltage at R., Vet(p) and (ii) the primary voltage Vpis in RMS value. (2 marks) (2 marks) Page 5 of 7