A car battery stores 12 V of energy. Of this energy, 9 V converts to electrical energy. The remaining energy converts to thermal energy. From the evidence, what is the efficiency of the battery?

75 %

Step-by-step explanation:

Total energy capacity of battery = 12 V

energy converted into electrical = 9 V

(Note: this energy will be utilized by the battery )

Energy converted into thermal = 12 V - 9 V = 3V

Note: this energy will be wasted by the battery \

Efficiency of battery is   determined by fraction of energy which is actually utilized out of total energy

since only 9 v of energy is utilized out of 12 v available energy

efficiency of battery = 9/12 = 3/4 = 0.75

Efficiency of battery  in percentage = 0.75 * 100 % = 75 %

the first dot plot best represents the data

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