PLEASE ANSWER ALL PARTS TO QUESTIONS 2. a. As you push a conductive loop into a
ID: 2078022 • Letter: P
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PLEASE ANSWER ALL PARTS TO QUESTIONS 2.
a. As you push a conductive loop into a magnetic field, energy is produced (as current flows through a resistor). Where does this energy come from? b. A sheet of aluminum, with its normal oriented due west, falls vertically toward the earths surface. As it falls, it encounters a uniform magnetic field that is directed due west. (i) Viewed from the east (i.e. looking west), what direction do the eddy currents flow in the sheet as it enters the field? (ii) Viewed from the east (i.e., looking west), what direction do the eddy currents flow in the sheet as it leaves the field? (iii) The current dissipates electrical energy. In what form is that energy before the sheet has entered the field? (iv) In what form is that energy after the current has ceased to flow? A rectangular copper loop is moved horizontally (i.e. parallel to the level ground) along the east-west axis only-with no twisting or lifting. At all times during its motion, it is at least partially within the shaded region shown, which contains a vertical, uniform magnetic field. The resulting current-time graph is shown here. Evaluate (T/F/N) each statement. Explain your reasoning. (i) In the time interval 5sExplanation / Answer
Q2. A
As we push a conducting loop into a magnetic field , work done by us on the conducting loop is produced as energy in conducting loop.
Q2. B.
So eddy current flows in anti clock-wise direction .As viewed from east.
2. As flux will decrease this time, current flows in such a direction that it opposes the decrease of flux.
So eddy current flows in clock-wise direction .As viewed from east.
3. It was in the persons as its potential energy which he used to push the loop.
4. This energy will be dissipated as heat produced in sheet due to flow of current.
Q2. C.
So loop is completely within the field.
So statement is true.
2. As in interval 2s<t<5s, current is increasing and in interval 7s<t<9s, current is decreasing.
So force exerted by the field on the loop changes its direction.
So statement is false.
3. As slope of graph (I vs t) in the interval 7s<t<9s is larger than in interval 2s<t<5s.
Loop was moving faster ) in the interval 7s<t<9s than in interval 2s<t<5s.
So statement is true.
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