•5 In Fig. 30-36, a wire forms a closed circular loop, of radius R = 2.0 m and resistance 4.0 0. The circle is centered on a long straight wire; at time t = 0, the current in the long straight wire is 5.0 A rightward. Thereafter, the current changes according to i = 5.0 A - (2.0 A/s?)P. (The straight wire is insulated; so there is no electrical contact between it and the wire of the loop.) What is the magnitude of the current induced in the loop at times t> 0?

•5 In Fig. 30-36, a wire forms a closed circular loop, of radius R = 2.0 m and resistance 4.0 0. The circle is centered on a long straight wire; at time t = 0, the current in the long straight wire is 5.0 A rightward. Thereafter, the current changes according to i = 5.0 A - (2.0 A/s?)P. (The straight wire is insulated; so there is no electrical contact between it and the wire of the loop.) What is the magnitude of the current induced in the loop at times t> 0?

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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#11
Why do we flip the fraction from 11/60 to 60/11 to calculate parallel resistance? How would we know we were suppose to do that if the instruction did not tell us.. (Please help me understand why that was done)
(a) The figure below shows two parallel conducting rails 15.2 cm apart, connected by a resistor with resistance R₂ = 5.00 Q. Two metal rods with resistances R₁ = 11.40 and R₂ = 15.0 (2 slide along the rails with negligible friction. Rod R₁ slides to the left at constant speed v₁ = 4.00 m/s, while rod R₂ slides at speed v₂ = 2.00 m/s. The rods and rails are in the presence of a uniform magnetic field pointing into the page, perpendicular to the plane of the rails, with a magnitude of Bin = 0.0100 T. +5 x x x x x x x x x x x x x x x x x x x x x x x x x x upward x x x ---Select--- X * x x x x x x x x Rg x x x x x R₁ R₂ What are the magnitude (in μA) and direction of the current through resistor R₂? μA magnitude direction x x x x (b) What If? What are the magnitude (in μA) and direction of the current through resistor R. if the rods move inward, instead of outward, with the same speeds as in part (a)? μA magnitude direction
←1.0m3 ↑ XXX xxx 1.0m xxx ↓ x is direction. of B 个 [.0m xxx xxx xxx V=4.0m/s X Consider the two scenarios (i) and (ii). (i) has a square wire in a magnetic field where the field changes -2.0 T/s. (ii) is in a constant magnetic field, B = 0.50 T but has a conducting bar that moves to the right at 4.0 m/s. Both scenarios have a total resistance of 2.0 2. (a) What is the EMF (voltage) in the wire loops in each scenario? (b) What is the current and direction of the current in each scenario?
•14 o In Fig. 30-42a, a uniform magnetic field B increases in magnitude with time t as given by Fig. 30-42b, where the vertical axis scale is set by B, = 9.0 mT and the horizontal scale is set by , = 3.0 s. A circular conducting loop of area 8.0 x 10-4 m² lies in the field, in the plane of the page. The amount of charge q passing point A on the loop is given in Fig. 30-42c as a function of t, with the vertical axis scale set by q, = 6.0 mC and the horizontal axis scale again set by t, = 3.0 s. What is the loop's resistance? B. 4. t (s) t (s) (a) (b) (c) B(mT) (ou) b
(a) The figure below shows two parallel conducting rails 11.6 cm apart, connected by a resistor with resistance R, = 5.00 n. Two metal rods with resistances R, = 13.0 0 and R., = 15.0 0 slide along the rails with negligible friction. Rod R, slides to the left at constant speed v, = 4.00 m/s, vwhile rod R, slides at speed v, = 2.00 m/s. The rods and rails are in the presence of a uniform magnetic field pointing into the page, perpendicular to the plane of the rails, with a magnitude of B = 0.0100 T. in X2x x x * Ry x R, What are the magnitude (in µA) and direction of the current through resistor R,? 278 What are the two motional emfs? What are their directions, based on the velocities of the rods and the direction of the field? From this, can you construct a circuit diagram that allows you to apply Kirchhoff's laws? Can you use Kirchhoff's laws to set up a system of equations that allows you to solve for the current through R,? Be careful of magnitude signs. HA direction upward (b) What…
The induced electron flow in Situation A would be ___.The induced electron flow in SItuation B would be ____.
•29 In Fig. 27-40, R = 6.00 n, R2 = 18.0 0, and the ideal battery has emf & = 12.0 V. What are the (a) size and (b) direction (left or right) of current i? (c) How much energy is dissipated by all four resis- tors in 1.00 min? R1 %3! R. ww R2 R, ww
91 SSM In the circuit of Fig. 30-76, R = 20 kn, R2 = 20 N, L = 50 mH, and the ideal battery has & = 40 V. Switch S has been open for a long oll L. R R2 time when it is closed at time t = 0. Just after the switch is closed, what シー are (a) the current ibat through the battery and (b) the rate dipal dt? At t = 3.0 us, what are (c) ibat and (d) dipaldt? A long time later, what are (e) ibat and (f) dipal dr? Figure 30-76 Problem 91.
A spherical surfaces r= 3 m and r=5 m are perfectly conducting and the total current passing radially outward through the medium between the two surfaces is (3 A) dc calculate: a) The voltage and the resistance between the spheres and (E) in the region between them, if a conducting material has o = 0.05 $/m is present for 3
(5) Current is flowing through a cylindrical copper wire with radius 6.33mm and length 92.1cm. This wire is hooked up to two capacitors in series C1 The capacitors both have cross sectional areas of A = 179cm2. (a) At a given moment in time, the current is I electrons is vd = 9.42µF and C2 = 8.11µF. = 77.97A and the drift velocity of the 45.6µm/s. What is the number density of electrons in this wire? (b) At a given moment in time, the charge on capacitor 2 is 62.6µC. What is the total change in potential across both capacitors combined? | (c) At the moment described in part (b), what is the energy stored in capacitor 2? (d) At the moment described in part (b), what is the energy density of the electric field in capacitor 2? :
11 Figure 29-34 shows three arrangements of three long straight wires carrying equal currents directly into or out of the page. (a) Rank the arrangements according to the magnitude of the net force on wire A due to the currents in the other wires, greatest first. (b) In arrangement 3, is the angle between the net force on wire A and the dashed line equal to, less than, or more than 45 ? -d- -D (1) (2) (3)