An The face than tommy people trying to understand heweireira week, Lots of circ

Question

An The face than tommy people trying to understand heweireira week, Lots of circuit. approach have invented some ways analogous believed de dectrons neweng aoua a onnducar collide with the aons in finally staggers througN the material with atoms average dein velocity. to flow of electrons that materials offer. A wine has a low We can talk about the resistanee Special electric elements that resist A light bulb has a much higher current now caled resesters. We will examine the behavior of these in electric circuits fianure labs. is possible lo use a two-dimensional mechanical analog to model this picture of current flow through conductors. You should note that the real flow of electrons rwo-dimensional analog is reproduced in Figure 3 15 The diagram for the arrive at the beeseen of Figure 31& As Aaalog to Eectrical Carreet Flow the current now analog and hen the following questions. 1.11 what port of whe represents the ation of e benery whaleepresents charge and current? ,stion 32 What ultimately happems to ave -energy" given bowling balls by the What plays the role of the bulb? How is this energy loss extribied that consists or a wines, and 3.3. How does this model help explain the fact clectric cument doo decrease when it nows through the bulb? Question How does this model help explain fact than electrons dont ceelerate when throwah circuit? In what would happen to current if the drift velocity doubled? What can you do to the ramp increase the drin velocity?

Explanation / Answer

1. Lifting of ball by a man to hight h represent the action of battery. For a mass m, a change of height h corresponds to a change in potential energy, U=mgh . Similarly For a charged particle q, a voltage V corresponds to a change in potential energy, U=qV

Ball represent the electric charge and flow of ball represent the current.

2. The ball loses the kinetic energy as they collide with the pegs and arrives at the bottom.

A light bilb completes the circuit. An electric circuit enables the movement of electric charges through a closed loop. The presence of an electric current causes free electrons to move around through the wires and filament held by a glass mount in the middle of the light bulb

Energy loss exhibited in the circuit due to collision of electron with the atoms

3. this is a DC voltage circuit. Current is restricted to flow in one direction only. this can be easily understand by the figur thar number of balls supplied by man will eventually come back to him because there is no other direction for the ball to go.

4. For a very short time, after the potential difference is applied, there will be an initial acceleration until the drift velocity is reached but they will not just get faster and faster on their journey along the wire. The extra kinetic energy of the electrons will be dissipated in passing through the metal lattice thats why, they will not accelerate

5. we have to increase the height of the ramp to provide more drift velocity. If the potential is increased the electrons are accelerated more rapidly towards positive potential after each collision. Consequently the electrons gain more average drift velocity towards positive potential. in this model, ball will collide more rapidly after doubling of drift velocity.

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