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9702/42/O/N/20: (a) A small coil is placed close to one end of a solenoid connected to a power supply. The plane of the small coil is normal to the axis of the solenoid, as illustrated in Fig. 9.1. The power supply causes the current I in the solenoid to vary with time t as shown in Fig. 9.2. #9702w20p42 #A2mutualInductanceP4 #A2inducedEmfGraphP4 (i) State Faraday’s law of electromagnetic induction. (ii) On the axes of Fig. 9.3, sketch a graph to show the variation with time t of the electromotive force (e.m.f.) induced in the small coil. (b) The small coil in (a) is now replaced by a Hall probe. The Hall probe is positioned so that the reading for the probe is a maximum. The current I in the solenoid varies again as shown in Fig. 9.2. On the axes of Fig. 9.4, sketch a graph to show the variation with time t of the reading VH of the probe. #A2hallEffectP4 #A2magneticInduction Playlist: • Ch20 Magnetic Induction (Part 2) | CAIE 97... #A2magneticFields Playlist: • Ch20 Magnetic Fields (Part 1) | CAIE 9702 ... ON20 Paper Discussion Playlist: • 9702 ON20 Papers CAIE Physics Instagram Pocket Guide ( / etphysics ) More Resources (https://9702-physics.blogspot.com/) Support us! ( / etphysics ) Tuition/Tutoring inquiries: Email: [email protected] Whatsapp: https://wa.me/60126679171 9702_w20_qp42 #CambridgeALevelPhysics