A 2.60N metal bar, 1.50 m long and having a resistance of 10 ohms, rests horizontally on conducting wires connecting it to the ircuit. The bar is in a uniform magnetic field B = 1.6 T and is not attached o the wires in the circuit. What is the acceleration of the bar just after the 25.0 N xS witch is closed? 120.0 V 10.0 N3 B X.
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- A solenoid is 40.0 cm long and has a diameter of 5.00 cm. It has 80.0 loops of wire. What is the magnetic field at the center when 0.500 A of current runs through it? O 1.58 x 10^-4 T 1.12 x 10^-3 T 3.26 x 10^-3 T O 1.26 x 10^-4 T 3.84 x 10^-4 TVo 1 → A - 12.0 cm Bcylindrical insulated wire with a diameter of 5.0 mm is tightly wound on a cylindrical hollow support 200 times with adjacent windings touching each other to form a solenoid. What is the magnitude of the magnetic field near its center on the solenoid axis when a current of 0.10 A flows through the wire? (u0 = 4 x 10-7 T.m/A) A. 6.6×10-5T B. 3.6x10-5T C. 1.3x10-5T D. 2.5x10-5T
- When the current through a circular loop is 6.0 A, the magnetic field at its center is 2.0 × 10−4 T. What is the radius of the loop?The accompanying figure shows a cross-section of a long, hollow, cylindrical conductor of inner radius r₁ = 3.5 cm and outer radius 72 = 5 cm. A 41-A current distributed uniformly over the cross-section flows into the page. Calculate the magnetic field at r = 1.5 cm, r = 4 cm, and r 8.5 cm. Hints r₁ 12 a. Magnetic field at r= 1,5 cm is (a). b. Magnetic field at r = 4 cm is (C). (b). c. Magnetic field at r = 8.5 cm is T. Additional hint for T. Additional hint for T. Additional hint for Use the "E" notation to enter your answer in scientific notation. For example, to enter 3.14 × 10-¹2, enter "3.14E- 12".A hydrogen ion moves at 6.35 ✕ 10^4 m/s perpendicular to the Earth's magnetic field at an altitude where field strength is 1.25 ✕ 10^−5 T. What is the radius (in m) of the circular path the ion follows? Mass of hydrogen ion=1.66*10^-27 kg and charge=1.602*10^-19 C.
- A long straight wire has a radius R, and a current of 3.0 A is uniformly-distributed throughout its solid interior. If the magnitude of the magnetic field at the surface of the wire is 0.24 T, the magnitude of the field at the interior radius r= 0.50R is closest to 0.80 T. O 0.24 T. o 0.040 T. O 0.32 T. O 0.12 T.The magnetic field produced by the solenoid in a magnetic resonance imaging (MRI) system designed for measurements on whole human bodies has a field strength of 8.83 T, and the current in the solenoid is 3.08 × 102 A. What is the number of turns per meter of length of the solenoid? Number i Units >An electron ( mẹ = 9.11×1031 kg. q=1.6x10-91 C) moves in a circular path perpendicular to a uniform magnetic field with a magnitude of 7.3 mT. If the speed of the electron is 1.50 x107 m/s, determine the radius of the circular path ( in units of cm). Select one: A. 0.04 B. 1.17 C. 0.62 D. 1.44 E. 1.72
- The toroid with tightly wound 100 turns of wire is shown below, each carrying a current I = 3 A. If a = 12 cm and b = 15 cm, the magnetic field at r = 18 cm, due to the current in this toroid, is (µ₁ = 4 × 10-7 N/A²) Ο 333 μ. Ο 500 μ. zero Ο 400 μ. O 600A long straight wire carries a current of 5.00 A, flowing in the upward direction. What is the magnetic field produced at a location 10.0 cm to the right of the wire? 1.00 x 10-5 T, into the screen (away from you) 2.00 x 10-5 T, out of the screen (toward you) 1.00 x 10-5 T, out of the screen (toward you) 2.00 x 10-5 T, into the screen (away from you)A 20-cm length of wire is held along an east- west direction and moved horizontally to the north with a speed of 3.0 m/s in a region where the magnetic field of the earth is 60 µiT directed 30° below the horizontal. What is the magnitude of the potential difference between the ends of the wire? O a 31 V O b. 36 uV 21 AV d. 18 V 24 uV