CALC A circular loop of wire with radius r = 0.0250 m and resistance R = 0.390 Ω is in a region of spatially uniform magnetic field, as shown in Fig. E29.23 . The magnetic field is directed into the plane of the figure. At t = 0, B = 0. The magnetic field then begins increasing, with B ( t ) = (0.380 T/s 3 ) t 3 What is the current in the loop (magnitude and direction) at the instant when B = 1.33 T? Figure E29.23
CALC A circular loop of wire with radius r = 0.0250 m and resistance R = 0.390 Ω is in a region of spatially uniform magnetic field, as shown in Fig. E29.23 . The magnetic field is directed into the plane of the figure. At t = 0, B = 0. The magnetic field then begins increasing, with B ( t ) = (0.380 T/s 3 ) t 3 What is the current in the loop (magnitude and direction) at the instant when B = 1.33 T? Figure E29.23
CALC A circular loop of wire with radius r = 0.0250 m and resistance R = 0.390 Ω is in a region of spatially uniform magnetic field, as shown in Fig. E29.23. The magnetic field is directed into the plane of the figure. At t = 0, B = 0. The magnetic field then begins increasing, with B(t) = (0.380 T/s3)t3 What is the current in the loop (magnitude and direction) at the instant when B = 1.33 T?
Certain types of particle detectors can be used to reconstruct the tracks left by unstable, fast-moving sub-atomic particles. Assume
that a track with a length of L=2.97 mm in the laboratory frame of reference has been observed. Further assume that you
determined from other detector data that the particle moved at a speed of L=0.910 ⚫ c, also in the laboratory frame of reference. c
denotes the speed of light in vacuum. What proper lifetime would you determine for this particle from the data given?
T= 4.0
S
generated worksheet
While cruising down University Boulevard you are stopped by a cop who states that you ran a red traffic light. Because you don't
want to pay the stiff fine, you are attempting a physics defense. You claim that due to the relativistic Doppler effect, the red color of
the light λ=616 nm appeared green '=531 nm to you. The cop makes a quick calculation of his own and rejects your defense.
How fast, in terms of your speed u divided by the speed of light in vacuum c, would you have to drive to justify your claim? Note
that the speed u is taken to be a positive quantity.
U 4.0
C
Chapter 29 Solutions
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