The figure shows a slidewire generator with d= 78 cm and R = 0.37 Q. A 0.937-N force is required to keep the bar moving at 0.51 m/s. What is the magnetic field magnitude? R 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
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- A very long wire bears a current of 0.50 A. What is the magnitude of the magnetic field 0.35 meters from the wire? Recall that in the case of an infinitely long straight wire, that the magnetic field strength is: Họi B (1) 2ar О А. 2.9 х 10-3т В. 2.9 х 10-5 Т C. 2.9 × 10-7 T D. 2.9 x 10-9 TA solenoid 3.0 cm long consists of 9000 loops of wire. If the magnetic field inside the solenoid is measured as 1.0 T, what is the magnitude of the current that flows through it? a 0.037 A b 0.37 A c 2.65 A d 3.05 A e 0.58 ASee the attached figure for this problem. A charge of 9.26 x 10^6 C moves to the right as shown through a region containing both a magnetic field of strength 2.94 T directed into the screen and an electric field of strength 6.76 x 10^5 N/C directed downward. The charge continues through the region at a constant velocity (no acceleration). What is the charge s speed?
- A cylindrical bar magnet of radius 1.00 cm and length 10.0 cm has a magnetic dipole moment of magnitude m = 2.00 A · m2. What is the magnetization M, assuming it to be uniform in the magnet? Answer in x10^4(A/m)Two long parallel wires 20 cm apart carry currents of 5.0 A and 8.0 A in opposite directions. What is the magnitude of the net magnetic field midway between the wires? O 1.3 x 10-5 T 1.0 x 10-5 T 2.6 x 10-5 T 6.0 x 10-6 T 1.6 x 10-5 TA proton travelling at a high velocity enters a 0.45 T magnetic field and travels in a circular path of radius 0.28 m as shown. A B=0.45 T X X X X X X X X X X X B What is the kinetic energy of the proton? And which path will the proton follow? A or B? x X X X X
- The magnetic field shown in the figure below has a uniform magnitude of 28.0 mT directed into the paper. The initial diameter of the kink is 2.00 cm. x x A. X X x x x x Need Help? X x x xxx x x xx x x x ---Select--- x x x x x x 2.00 cm x x x X x x xxx X B XX x x i (a) The wire is quickly pulled taut, and the kink shrinks to a diameter of zero in 51.0 ms. Determine the average voltage induced between endpoints A and B. Include the polarity. magnitude mV polarity x x x x (b) Suppose the kink is undisturbed, but the magnetic field increases to 104 mT in 4.35 × 10-³ s. Determine the average voltage across terminals A and B, including polarity, during this period. magnitude mV/ polarity ---Select--- A is positive relative to B. B is positive relative to A. The voltage is zero.A magnetic field directed into the page changes with time according to B = 0.035 or? + 1.40, where B is in teslas and t is in seconds. The field has a circular cross section of radius R = 2.50 cm (see figure below). x x x x * * x X x x x xx x X X x x X x x x x x R x * x x x x X x x x x x Bin (a) When := 4.70 s and r = 0.020 0 m, what is the magnitude of the electric field at point P,? N/C (b) When = 4.70 s and r,= 0.020 0 m, what is the direction of the electric field at point P,? O perpendicular to r2 and clockwise O perpendicular to r, and counterclockwise into the page O out of the pageThe magnetic field shown in the figure below has a uniform magnitude of 26.0 mT directed into the paper. The initial diameter of the kink is 2.00 cm. x x A. x * x x x x x x x x x x x x x x x x ---Select--- 2.00 cm ---Select--- x x x X x x X x X x x x x X x x XOX B x (a) The wire is quickly pulled taut, and the kink shrinks to a diameter of zero in 49.0 ms. Determine the average voltage induced between endpoints A and B. Include the polarity. magnitude mV polarity x -3 (b) Suppose the kink is undisturbed, but the magnetic field increases to 105 mT in 4.05 x 107 s. Determine the average voltage across terminals A and B, including polarity, during this period. magnitude mV polarity