A copper bar of length h and electric resistance R slides with negligible friction on metal rails that have negligible electric resistance. The rails are connected on the right with a wire of negligible electric resistance, and a magnetic compass is placed under this wire (the diagram is a top view). The compass needle deflects to the right of north, as shown on the diagram. Throughout this region there is a uniform magnetic field B pointing out of the page, produced by large coils that are not shown. This magnetic field is increasing with time, and the magnitude is B = Bo + bt, where Bo and b are constants, and t is the time in seconds. You slide the copper bar to the right and at timet = 0 you release the bar when it is a distance x from the right end of the apparatus. At that instant the bar is moving to the right with a speed v. (a) Calculate the magnitude of the initial current I in this circuit. North Resistance R (b) Calculate the magnitude of the net force on the bar just after you release it. (c) Will the bar speed up, slow down, or slide at a constant speed? Explain briefly. B = Bo + bt
A copper bar of length h and electric resistance R slides with negligible friction on metal rails that have negligible electric resistance. The rails are connected on the right with a wire of negligible electric resistance, and a magnetic compass is placed under this wire (the diagram is a top view). The compass needle deflects to the right of north, as shown on the diagram. Throughout this region there is a uniform magnetic field B pointing out of the page, produced by large coils that are not shown. This magnetic field is increasing with time, and the magnitude is B = Bo + bt, where Bo and b are constants, and t is the time in seconds. You slide the copper bar to the right and at timet = 0 you release the bar when it is a distance x from the right end of the apparatus. At that instant the bar is moving to the right with a speed v. (a) Calculate the magnitude of the initial current I in this circuit. North Resistance R (b) Calculate the magnitude of the net force on the bar just after you release it. (c) Will the bar speed up, slow down, or slide at a constant speed? Explain briefly. B = Bo + bt
College Physics
11th Edition
ISBN:9781305952300
Author:Raymond A. Serway, Chris Vuille
Publisher:Raymond A. Serway, Chris Vuille
Chapter1: Units, Trigonometry. And Vectors
Section: Chapter Questions
Problem 1CQ: Estimate the order of magnitude of the length, in meters, of each of the following; (a) a mouse, (b)...
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can you help with sub questions a, b, and c
this is not and will not be graded
Transcribed Image Text:A copper bar of length h and electric resistance R slides with negligible friction on metal
rails that have negligible electric resistance. The rails are connected on the right with a
wire of negligible electric resistance, and a magnetic compass is placed under this wire (the
diagram is a top view). The compass needle deflects to the right of north, as shown on the
diagram. Throughout this region there is a uniform magnetic field B pointing out of the page,
produced by large coils that are not shown. This magnetic field is increasing with time, and
the magnitude is B = Bo + bt, where Bo and b are constants, and t is the time in seconds.
You slide the copper bar to the right and at time t
distance x from the right end of the apparatus. At that instant the bar is moving to the right
with a speed v.
0 you release the bar when it is a
(a) Calculate the magnitude of the initial
current I in this circuit.
North
Resistance R
(b) Calculate the magnitude of the net
force on the bar just after you release
it.
(c) Will the bar speed up, slow down, or
slide at a constant speed? Explain
briefly.
B = Bo + bt
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