After a hard day at work, Dr. Dave and Dr. Trombetta go to their cars and find t

Question

After a hard day at work, Dr. Dave and Dr. Trombetta go to their cars and find that one of them has a dead battery! They decide to "jump" start the car that has the dead battery, which they do by connecting the batteries as shown in the diagram below. (Note the little half-circle where the battery cables cross near Dr. T's battery. This indicates that there is no connection here - the cables simply cross over each other.) Dr. Dave happens to have a current meter on him, so he measures the current i_jump in the figure, and finds that it is 30 [A]. Which car has the dead battery? Assuming the current i_jump and the battery voltages remain constant, how much energy is transferred to the dead battery in 1 [min]?

Explanation / Answer

a)

Answer: Dr. T's Battery is dead battery.

b)

Answer: Energy E=VQ jouls.

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