A fully charged mobile phone with a 12 V battery is good for a 20 minu – McqOptions

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1.	A fully charged mobile phone with a 12 V battery is good for a 20 minute talktime. Assume that, during the talk time, the battery delivers a constant current of 2 A and its voltage drops linearly from 12 V to 10 V as shown in the figure. How much energy does the battery deliver during this talk time?
A.	220 J
B.	12 kJ
C.	13.2 kJ
D.	14.4 kJ
Answer» D. 14.4 kJ

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