Consider the length of wire that connects the batteries to the lightbulb in a ty

Question

Consider the length of wire that connects the batteries to the lightbulb in a typical flashlight. (Assume that the length of the wire is 20 cm and the drift speed is 1.28 x 10-4 m/s.) (a) Estimate the time it would take an imaginary positive charge to make its way through this length of wire. Explain how you found any values you use This answer has not been graded yet. (b) How does your answer compare to the amount of time it takes before the light appears? (Use your experience from switching on a flashlight.) O The light appears after the time estimated in part (a). O The light appears almost immediately Comment on your results

Explanation / Answer

time taken = l/v =0.2/1.28*10^(-4) = 1.56*10^(5) sec (ans)

This is the time taken by positive charge to go through the distance of 20 cm

b) The light appears immediately

Drift speed assumes the imaginary motion of particle inside the wire while inside the wire they are already present everywhere from start to end and no real motion takes place so light appears immediately

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