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9. A battery is formed of five equal cells joined in series. When the external resistance is 4 ohms, the current is 1.5 A and when the external resistance is 9 ohms the current falls to 0.75 A, find the internal resistance (rint)of each cell. (figure 3).

9. A battery is formed of five equal cells joined in series. When the external resistance is 4 ohms, the current is 1.5 A and when the external resistance is 9 ohms the current falls to 0.75 A, find the internal resistance (rint)of each cell. (figure 3).

Introductory Circuit Analysis (13th Edition)
Introductory Circuit Analysis (13th Edition)
13th Edition
ISBN:9780133923605
Author:Robert L. Boylestad
Publisher:Robert L. Boylestad
Chapter1: Introduction
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9. A battery is formed of five equal cells joined in series. When the external resistance is 4 ohms, the current is 1.5 A and when the external resistance is 9 ohms the current falls to 0.75 A, find the internal resistance (rint)of each cell. (figure 3). 10. Two lamps A and B are connected in series. Lamp A is rated 50W at 100v while lamp B is rated at 100W at 100v also. The two lamp are to be connected in series across a 200-v source. What resistance (R) must be connected across lamp A so that each lamp will operate properly? (figure 4). Figure 4 CAMPS Figure 3 421.5A 952075A R R R 200V rint upo e'noh obadsco belosn 0oW B. 100V V BATTERY 5 CELLS CELL dabo doss lo auicv o or lob lo loe ㄩOㄩ
Transcribed Image Text:9. A battery is formed of five equal cells joined in series. When the external resistance is 4 ohms, the current is 1.5 A and when the external resistance is 9 ohms the current falls to 0.75 A, find the internal resistance (rint)of each cell. (figure 3). 10. Two lamps A and B are connected in series. Lamp A is rated 50W at 100v while lamp B is rated at 100W at 100v also. The two lamp are to be connected in series across a 200-v source. What resistance (R) must be connected across lamp A so that each lamp will operate properly? (figure 4). Figure 4 CAMPS Figure 3 421.5A 952075A R R R 200V rint upo e'noh obadsco belosn 0oW B. 100V V BATTERY 5 CELLS CELL dabo doss lo auicv o or lob lo loe ㄩOㄩ
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