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Chapter 30: Q96P (page 902)
A square loop of wire is held in a uniformB=0.24Tmagnetic field directed perpendicular to the plane of the loop. The length of each side of the square is decreasing at a constant rate of 5.0 cm/s. What emf is induced in the loop when the length is 12 cm ?
The induced in the loop is,
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In Figure, a rectangular loop of wire with lengthis placed near an infinitely long wire carrying current i = 4.7 A. The loop is then moved away from the wire at constant speed v = 3.2 mm/s. When the center of the loop is at distance r = 1.5b, (a) what is the magnitude of the magnetic flux through the loop?(b) what is the current induced in the loop? 
Question: An electric generator contains a coil of 100 turnsof wire, each forming a rectangular loop 50.0cm to 30.0cm. The coil is placed entirely in a uniform magnetic field with magnitude B = 3.50 Tand withinitially perpendicular to the coil鈥檚 plane. What is the maximum value of the emf produced when the coil is spun at 1000 rev/min about an axis perpendicular to?
A wire loop of radius 12 cmand resistanceis located in a uniform magnetic field that changes in magnitude as given in Figure. The vertical axis scale is set by, and the horizontal axis scale is set by. The loop鈥檚 plane is perpendicular to. What emf is induced in the loop during time intervals (a) 0 to 2.0 s,(b) 2.0 s to 4.0 s, and (c) 4.0 s to 6.0 s?
Figure 30-74 shows a uniform magnetic field confined to a cylindrical volume of radius R. The magnitude of is decreasing at a constant rate of 10m Ts. In unit-vector notation, what is the initial acceleration of an electron released at (a) point a (radial distance r=0.05m ), (b) point b (r =0 ), and (c) point c (r =0.05m)?
The wire loop in Fig. 30-22ais subjected, in turn, to six uniform magnetic fields, each directed parallel to the axis, which is directed out of the plane of the figure. Figure 30- 22bgives the z components Bz of the fields versus time . (Plots 1 and 3 are parallel; so are plots 4 and 6. Plots 2 and 5 are parallel to the time axis.) Rank the six plots according to the emf induced in the loop, greatest clockwise emf first, greatest counter-clockwise emf last.
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