ON21 P23 Q6 Galvanometer Potentiometer Circuit | Oct/Nov 2021 | Cambridge A Level 9702 Physics
9702/23/O/N/21: (a) A resistance wire of uniform cross-sectional area 3.3 × 10^–7 m2 and length 2.0 m is made of metal of resistivity 5.0 × 10^–7 Ω m. Show that the resistance of the wire is 3.0 Ω.
#9702w21p23 #AScircuitsP2 #ASresistanceP2
(b) The ends of the resistance wire in (a) are connected to the terminals X and Y in the circuit shown in Fig. 6.1. The cell has an electromotive force (e.m.f.) of 1.50 V and internal resistance r. The potential difference between X and Y is 1.20 V. Calculate:
(i) the current in the circuit
(ii) the internal resistance r.
#ASinternalResistanceP2
(c) A galvanometer and a cell of e.m.f. E with negligible internal resistance are connected to the circuit in (b), as shown in Fig. 6.2. The resistance wire between X and Y has a length of 2.0 m. The galvanometer has a reading of zero when the connection P is adjusted so that the length XP is 1.4 m. Determine the e.m.f. E of the cell.
(d) The circuit in Fig. 6.2 is modified by replacing the original resistance wire with a second resistance wire. The second wire has the same length as the original wire and is made of the same metal. The second wire has a smaller cross-sectional area than the original wire. Connection P is adjusted on the second wire so that the galvanometer has a reading of zero. State and explain whether length XP for the second wire is shorter than, longer than or the same as length XP for the original wire when the galvanometer reading is zero. #ASpotentiometerP2 #Lv3
#DCcircuits Playlist
• Ch10 DC Circuits | CAIE 9702 AS Physics
#CurrentOfElectricity Playlist:
• Ch9 Current of Electricity | CAIE 970...
ON21 Paper Discussion Playlist
• 9702 ON21 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
#CambridgeALevelPhysics
9702_w21_qp23
Смотрите видео ON21 P23 Q6 Galvanometer Potentiometer Circuit | Oct/Nov 2021 | Cambridge A Level 9702 Physics онлайн без регистрации, длительностью часов минут секунд в хорошем качестве. Это видео добавил пользователь ETphysics 16 Май 2022, не забудьте поделиться им ссылкой с друзьями и знакомыми, на нашем сайте его посмотрели 5,756 раз и оно понравилось 109 людям.