Automobile Electric Starter Part A The electric starter in an automobile equippe

Question

Automobile Electric Starter Part A The electric starter in an automobile equipped with a 12 V battery draws a current of 65.00 A when in operation. Suppose it takes the motor 2.00 s to start the engine. What amount of electric energy has been withdrawn from the battery? Submit Answer Tries 0/15 Part B The automobile is equipped with a generator that delivers 7.40 A to the battery when the engine is running. How long must the engine run in order for the generator to restore the energy in the battery to its original level? Submit Answer Tries 0/15

Explanation / Answer

here,

A)

voltage , V = 12 V

current , I = 65 A

time taken , t = 2 s

the energy taken , E = V* I * t

E = 12 * 65 * 2 J

E = 1560 J

B)

voltage , V = 12 V

current , I = 7.4 A

let the time taken be t

the energy taken , E = V * I * t

1560 = 12 * 7.4 * t

t = 17.6 s

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