31.12 A closely wound, flat, circular coil of 25 turns of wire has a diameter of 10 cm and carries a current of 4.0 A. Determine the value of B at its center. Ans. 1.3 x 10-3 Wb/m?
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- A 4 m long conductor carrying a current of 10 A in the moon direction lies on the y axis between y = ± 2 m. If area B = 0.05ax T, find the work done by moving the conductor at constant speed x = z = 2 m parallel to itself. A. 2 JB. NoneC. 0 JD. 6 JE. 4 J4. A very long coaxial cable consists of a solid cylindrical inner conductor of radius a, surrounded by an outer cylindrical conductor with inner radius b and outer radius c. The inner wire and outer wire (cylinder) do not touch each other. The inner wire has a current in it I, and the outer wire has a current in it I,. 4 is out of the page and Iz is into the page. Use Ampere's law to find an equation for the magnetic field strength (a) between the two wires (ac). (c) If I, and I, were equal but still opposite in direction what would be the magnetic field strength outside of the cable (r>c)?What is the energy density at the center of a circular loop of wire carrying a 23.0 A current if the radius of the loop is 25.0 cm?
- 15. Two long, straight wires are parallel to each other and are 1.0 cm apart. The current through I wire is 3.0 A and the current through wire II is 10.0 A. Each is flowing in opposite directions. Which of the following statements best describes the force per unit length on wire 1?a. 6.0 x 10 -6 N/mb. 6.0 x 10 -4 N/mc. 3.8 x 10 -5 N/md. 6.0 x 10 -5N/me. 6.0 x 10 -7 N/mIf 42.7 cm of copper wire (diameter = 1.28 mm, resistivity = 1.69 × 10-8Q.m) is formed into a circular loop and placed perpendicular to a uniform magnetic field that is increasing at the constant rate of 7.93 m/s, at what rate is thermal energy generated in the loop? Number UnitsA 9.00-uC charge is moving with a speed of 7.50 x 10^6 m/s parallel to a long, straight wire. The wire carries a current of 77.0 A in the same direction as the moving charge, and is 5.00 x 10-2m away from the charge.Find the magnitude (in Newtons) on the charge. Use 4 decimal places
- Identify the mathematical statement for electric current. Select one: Δν а. I = At Ob. Δν I = Av C. ΔR I = Av O d. AQ I = AtTwo parallel wires separated by 4.00 cm repel each other with a force per unit length of 2x10-4 N/m. The current in one wire is 5.00 A.a. Find the current in the other wire.b. Are the currents in the same or opposite direction? c. What would happen if the direction of one current were reversed and doubled?A loop of wire with a radius of 0.16 m and resistance, 47.4 Ohms is in a region with a changing magnetic field that is oriented perpendicular to the loop. If the magnetic field increases linearly from 0.011 T to 0.05 T, over 5.59 x 10-3 s, what is the current in the loop? Please give your answer in Amps.