plese 1.4 HOMEWORK PROBLEMSSection 1.2: Charge, Current andVoltage1.1 A free electron has an initial potential energy perunit charge (voltage) of 17 kJ/C and a velocity of93 Mm/s. Later, its potential energy per unit chargeis 6 kJ/C. Determine the change in velocity of theelectron.1.2 The units for voltage, current, and resistance are thevolt (V), the ampere (A), and the ohm (S2), respectively.Express each unit in fundamental MKS units.1.3 A particular fully charged battery can deliver2.7.106 coulombs of charge.a. What is the capacity of the battery inampere-hours?b. How many electrons can be delivered?inoru1.4. The charge cycle shown in Figure P1.4 is anexample of a three-rate charge. The current is heldconstant at 30 mA for 6 h. Then it is switched to20 mA for the next 3 h. Find:a. The total charge transferred to the battery.b. The energy transferred to the battery.Hint: Energy w is the integral of power,or P = dw/dt.Battery voltageBattery current1.7 V1.2 V1.50.6 V0.5 V30 mA20 mA00Figure P1.43h3h6h6h9h9hBatteries (e.g., lead-acid batteries) store and releasechemical potential energy. Batteries do not storeelectric charge. During discharge, electrons exit thecathode terminal and reenter the battery at the anodeterminal having done work on some external device(e.g., a lightbulb). The chemical energy stored in thebattery is used to replenish the potential energy ofthose same electrons. It is convenient to think ofpositive carriers flowing in the opposite direction,that is, conventional current, and exiting at a higheauto voltage. (Benjamin Franklin caused this mess!) Fora battery rated at 12 V and 350 A-h, determine:

Given data The graph of the battery current and battery voltage is given in the problem. Battery…

Answered: 1.4. The charge cycle shown in Figure…

Electricity for Refrigeration, Heating, and Air Conditioning (MindTap Course List)

10th Edition

ISBN:9781337399128

Author:Russell E. Smith

Publisher:Russell E. Smith

Chapter12: Electronic Control Devices

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