27. Which of the following statements is the correct reason for using soft iron in making the armature of an electric bell? A. It is a diamagnetic material. B. It loses its magnetism readily. C. It is not easily magnetized. D. It retains its magnetism for a long time. 28. The diagram above illustrates a meter bridge circuit under balanced condition. Determine the value of x. A. 71.4 cm B. 10.0 cm C. 28.6 cm D. 57.2 cm 29. Which of the following devices is used for storing electric charges? A. Transformer B. Ammeter C. Potentiometer D. Capacitor -31 6 -1 An electron of mass 9.1 x 10 kg moves with a speed of 2.0 x 10 ms round the -11 nucleus of an atom in a circular path of radius 6.1 x 10 m. Use the information to answer questions 30 and 31. 30. Determine the angular speed of the electron. 16 -1 A. 3.28x10 rad s 3 -1 B. 8.55 x 10 rad s 13 -1 C. 9.11 x 10 rad s 15 -1 D. 5.22 x 10 rad s Want more Physics SSCE Exam Questions Get the Complete WAEC Physics Exam Past Questions Paper and Answers (Objective Test & Essay) in PDF or Ms-Word from us Continue reading to know how....