What is the lamps resistance? what fraction of the power, Ask an Expert

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Q. Two 1.80 V batteries with their positive terminals in the same direction--are inserted in series into the barrel of a flashlight. One battery has an internal resistance of 0.310, the other an internal resistance of 0.153. When the switch is closed, a current of 0.600 A passes through the lamp.

What is the lamp's resistance? What fraction of the power dissipated is dissipated in batteries?

Q. A uniform electric field of magnitude 350N/C pointing in the positive x-direction acts on an electron, which is at first at rest. The electron has moved 3.6cm.

What is the work completed by the field on the electron?

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