A 1.50-V battery supplies 0.244 W of power to a small flashlight. If the battery moves 2.53 1020 electrons between its terminals during the time the flashlight is in operation, how long was the flashlight used?

Question

A 1.50-V battery supplies 0.244 W of power to a small flashlight. If the battery moves 2.53  1020 electrons between its terminals during the time the flashlight is in operation, how long was the flashlight used?

bobpursley · Answer

numberelectrons*charge/electron*Voltage*timeinSeconds=.244 solve for time