Consider a lightbulb circuit such as the one in thefigure 1)From the simple obse

Question

Consider a lightbulb circuit such as the one in thefigure 1)From the simple observations and measurements you can makeon this circuit, can you distinguish a current composed of positivecharge carriers from a current composed of negative chargecarriers? If so, describe how you can tell which it is. If not, whynot? 2)One model of current is the motion of discrete chargedparticles. Another model is that current is the flow of acontinuous charged fluid. Do simple observations and measurementson this circuit provide evidence in favor of either one of thesemodels? If so, describe how. 1)From the simple observations and measurements you can makeon this circuit, can you distinguish a current composed of positivecharge carriers from a current composed of negative chargecarriers? If so, describe how you can tell which it is. If not, whynot? 2)One model of current is the motion of discrete chargedparticles. Another model is that current is the flow of acontinuous charged fluid. Do simple observations and measurementson this circuit provide evidence in favor of either one of thesemodels? If so, describe how. Consider a lightbulb circuit such as the one in the figure 1)From the simple observations and measurements you can makeon this circuit, can you distinguish a current composed of positivecharge carriers from a current composed of negative chargecarriers? If so, describe how you can tell which it is. If not, whynot? 2)One model of current is the motion of discrete chargedparticles. Another model is that current is the flow of acontinuous charged fluid. Do simple observations and measurementson this circuit provide evidence in favor of either one of thesemodels? If so, describe how.

Explanation / Answer

1)

current in a ciruit is always due a potential difference which makes free electrons the negative charged carriers to flow from negative terminal to towards the positive terminal, +ve ions as such does not move as they are bound to the matter lattice structure. so we can say that current is always due to the movement of electrons and not that of ion.

2)

the model which says that current is the movement of discreet charge particle is true as charge is itself a quantized quantity. q= ne, here n is n is no. of electrons and e is the individual electron charge. simple measurement provides evidence as if you see that counductivity of every material is different as its no. of available free electron is different so this itself tell that it is discreet in nature and not continuous.

another model is completely wrong.

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