A lightbulb is connected to a battery by two two copper wires of equal lengths but different thicknesses. A thick wire connects one side of the lightbulb to the positive terminal of the battery and a thin wire connects the other side of the bulb to the negative terminal.

a. Which wire carries a greater current? Or is the current the same in both? Explain.

b. If the two wires are switched, will the bulb get brighter, dimmer, or stay the same? Explain.

Explanation:

a ) Current remains the same throughout the whole of a closed circuit if all the resistances are in series. So current will remain the same in both these conductors as they are in series.

b ) If the two wires are switched or exchanged mutually , there will not be any change in the current are they will still remain in series and total resistance remains the same . so current will remain the same . Hence the current through the bulb will remain unchanged . The brightness too will remain the same.