•6 Figure 30-37a shows a circuit consisting of an ideal battery with emf & = 6.00 µV, a resistance R, and a small wire loop of area 5.0 cm?. For the time interval t= 10 s to t = 20 s, an external mag- netic field is set up throughout the loop. The field is uniform, its direction is into the page in Fig. 30-37a, and the field magnitude is given by B = at, where B is in teslas, a is a constant, and t is in seconds. Figure 30-37b gives the current i in the circuit before, dur- ing, and after the external field is set up. The vertical axis scale is set by i, = 2.0 mA. Find the constant a in the equation for the field magnitude. %3D 30 (a) (b) t (s) (vu)!

•6 Figure 30-37a shows a circuit consisting of an ideal battery with emf & = 6.00 µV, a resistance R, and a small wire loop of area 5.0 cm?. For the time interval t= 10 s to t = 20 s, an external mag- netic field is set up throughout the loop. The field is uniform, its direction is into the page in Fig. 30-37a, and the field magnitude is given by B = at, where B is in teslas, a is a constant, and t is in seconds. Figure 30-37b gives the current i in the circuit before, dur- ing, and after the external field is set up. The vertical axis scale is set by i, = 2.0 mA. Find the constant a in the equation for the field magnitude. %3D 30 (a) (b) t (s) (vu)!

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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Question

•6 Figure 30-37a shows a circuit consisting of an ideal battery
with emf & = 6.00 µV, a resistance R, and a small wire loop of area
5.0 cm?. For the time interval t= 10 s to t = 20 s, an external mag-
netic field is set up throughout the loop. The field is uniform, its
direction is into the page in Fig. 30-37a, and the field magnitude is
given by B = at, where B is in teslas, a is a constant, and t is in
seconds. Figure 30-37b gives the current i in the circuit before, dur-
ing, and after the external field is set up. The vertical axis scale is
set by i, = 2.0 mA. Find the constant a in the equation for the field
magnitude.
%3D
30
(a)
(b)
t (s)
(vu)!

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