1. The power supply used in an electric vehicle contains 990 rechargeable cells each of electromotive force (e.m.f.) 1.2 V . The cells are contained in packs in which all the cells are in series with each other. The e.m.f. of each pack is 54 V . Calculate the number of packs in the power supply. Total voltage \( =1.2 \times 990 \) \( =1188 \mathrm{~V} \) Voltage in ! pack=54 voltage is \( x \) pack \( =1188 \)
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m.f.) of all the cells combined. - Each cell has an e.m.f. of 1.2 V. - There are 990 cells. - Total e.m.f. = \(1.2 \, \text{V} \times 990 = 1188 \, \text{V}\). Show more…
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