for the questions below,consider two long ,parallel metal rails,which are a dist
ID: 2128091 • Letter: F
Question
for the questions below,consider two long ,parallel metal rails,which are a distance D = 10 cm apart,as illustrated below.They are connected via a battery that supplies a potential difference delta v= 100V across them.The circuit is completed by a metal bar that is placed across the rails and which is free to slide left or right along the rails.In the problems below,ignore sliding friction ad assume the resistance of the rails is neglible compared to the resistance (R=10 ohn )of the bar.The whole apparatus is placed in a region containing a uniform magnetic field of strength B= 1.0 T.
Question A
i)In what direction should the uniform magnetic field be to generate the maximum acceleration of the bar to the right ?
II)Suppose that ,a particular instant,the current in the circuit is I=8 A and the bar is travelling with a velocity of v=200m/s to the right .What is the magnetic field does work on the bar?
iii)comapre your result in (ii) to the power supplied by the battery .comment on any difference you find.is this result consistent with the conservation of energy ?
for the questions below, consider two long ,parallel metal rails, which are a distance D = 10 cm apart,as illustrated below. They are connected via a battery that supplies a potential difference delta v= 100V across them. The circuit is completed by a metal bar that is placed across the rails and which is free to slide left or right along the rails. In the problems below,ignore sliding friction ad assume the resistance of the rails is negligible compared to the resistance (R=10 ohn )of the bar. The whole apparatus is placed in a region containing a uniform magnetic field of strength B= 1.0 T. In what direction should the uniform magnetic field be to generate the maximum acceleration of the bar to the right ? Suppose that ,a particular instant, the current in the circuit is I=8 A and the bar is travelling with a velocity of v=200m/s to the right .What is the magnetic field does work on the bar? compare your result in (ii) to the power supplied by the battery .comment on any difference you find is this result consistent with the conservation of energy ?Explanation / Answer
1) according to flemings left hand rule ......magnetic field must be into the page,........
2)emf e=B*l*V.... B=e/(l*V)=80/(20)=4 T...
3)power supplied by battery=p=delta*I=100*8=800 W
Related Questions
Navigate
Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.