EBK THE COSMIC PERSPECTIVE
EBK THE COSMIC PERSPECTIVE
9th Edition
ISBN: 9780135161760
Author: Voit
Publisher: VST
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Chapter S4, Problem 42EAP
To determine

To Discuss: The role ofelectromagnetic forces in governing all the biological and chemical reactions.

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In the figure, a 120-turn coil of radius 3.6 cm and resistance 7.6 Q is coaxial with a solenoid of 170 turns/cm and diameter 4.7 cm. The solenoid current drops from 1.4 A to zero in time interval At = 27 ms. What current is induced in amperes in the coil during At? Coil Solenoid
In the figure, the magnetic flux through the loop increases according to the relation B = 6.4t² + 9.8t, where QB is in milliwebers and t is in seconds. (a) What is the magnitude of the emf induced in the loop when t = 2.7 s? (b) Is the direction of the current through R to the right or left?
An RLC circuit such as that of Figure (a) has R = 5.65 QQ, C = 19.7 µF, L = 1.34 H, and &m = 35.2 V. (a) At what angular frequency w will the current amplitude have its maximum value, as in the resonance curves of Figure (b)? (b) What is this maximum value? At what (c) lower angular frequency Wd1 and (d) higher angular frequency wa2 will the current amplitude be half this maximum value? (e) What is (wd2- Wd1)/Wd, the fractional half-width of the resonance curve for this circuit? Current amplitude I L 000 (a) R R= 10 Ω Xc> XL XL> Xc R = 30 Ω R= 100 Q 0.90 0.95 1.00 1.05 1.10 wa/w0
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