a. b. A metal frame (shown in gray) sits in a region of uniform magnetic field. A thin, rigid wire can slide along the side legs of the frame. Suppose the wire is pulled to the right with a speed of 4.0 cm/s and B = 0.05 T. Also, let a = 30 cm. The wire and frame have negligible electrical resistance but the contact resistance between the wire and the frame provides a total of 6.0 Ohms. Determine the direction of the induced current in the wire and frame circuit. Calculate the magnitude of the induced current in the wire and frame. Express your answer in milli-Amps.
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- Q43.7 an electrician has a long conductive wire. it carries a current of I=2.00A. the electrician bends the wire to make a loop-arc shape (refer to image provided). the loop-arc shape has a total radius or r=10.0 cm. help the elctrician figure out the magnitude and direction of the magnetic feild at point P which is located at the center of the loop-arc.Pr4. A solid, long insulating cylinder of radius R is uniformly charged over the entire volume, its volume charge density is e. The cylinder rotates with constant angular velocity w around its symmetry axis. Find the direction and magnitude of the magnetic field created by the rotating cylinder as a function of the distance r measured from the symmetry axis (r < R). Hint: Use Ampere's law.A strip of metal (made from copper, with 8.47 x 1028 charge carriers/m³) is placed in a uniform magnetic field oriented perpendicular to the strip with magnitude 0.205 T. A current i = 6.18 A is passed through the strip, giving rise to a Hall potential across its thickness of 0.481 mm. What is the magnitude of the Hall potential that arises? i V
- 1. A 11.8 ?F capacitor is charged by a 25.0 V battery through a resistance R. The capacitor reaches a potential difference of 4.00 V at a time 3.00 s after charging begins. Find R. ________ kΩ 2.A proton moves perpendicular to a uniform magnetic field at a speed of 1.20 107 m/s and experiences an acceleration of 1.40 1013 m/s2 in the positive x-direction when its velocity is in the positive z-direction. Determine the magnitude and direction of the field. magnitude _______ PLEASE ANSWER BOTHA proton enters a region of uniform magnetic feild (B) = (0.020 I)T and a uniform electric feild E . When the velocity of the proton is (3000k) m/s, it experiences an acceleration of (9.6x10^9 j) m/s². The magnitude E of the electric feild is equal to what? The options below have units V/m. a. 160 V/m b. 100 V/m c. 60 V/m d. 40 V/m e. 0Figure P19.64 is a setup that can be used to measuremagnetic fields. A rectangular coil of wire contains N turnsand has a width w. The coil is attached to one arm of a balanceand is suspended between the poles of a magnet. The fieldis uniform and perpendicular to the plane of the coil. Thesystem is first balanced when the current in the coil is zero.When the switch is closed and the coil carries a current I, amass m must be added to the right side to balance the system.(a) Find an expression for the magnitude of the magneticfield and determine its direction. (b) Why is the result independentof the vertical dimension of the coil? (c) Supposethe coil has 50 turns and width of 5.0 cm. When the switch is closed, the coil carries a current of 0.30 A, and a mass of 20.0 gmust be added to the right side to balance the system. What isthe magnitude of the magnetic field?
- The accompanying figure shows a cross-section of a long, hollow, cylindrical conductor of inner radius r₁ = 3.5 cm and outer radius r2 = 7 cm. A 51-A current distributed uniformly over the cross-section flows into the page. Calculate the magnetic field at r = 0.5 cm, r = 6.5 cm, and T = 8 cm. 12 Hints a. Magnetic field at r = 0.5 cm is 0 b. Magnetic field at r = 6.5 cm is c. Magnetic field at r = 8 cm is T. Additional hint for (a) T. Additional hint for (b) T. Additional hint for (c)A piece of copper wire has a resistance per unit length of 4.63 × 10/m. The wire is wound into a thin, flat coil of many turns that has a radius of 0.208 m. The ends of the wire are connected to a 12.0-V battery. Find the magnetic field strength at the center of the coil. Number i Units >q16
- In the figure, a conducting rod of length L= 25.0 cm moves in a magnetic field B → of magnitude 0.490 T directed into the plane of the figure. The rod moves with speed v = 4.00 m/s in the direction shown. When the charges in the rod are in equilibrium, what is the magnitude E of the electric field within the rod? What is the magnitude Vba of the potential difference between the ends of the rod? What is the magnitude E of the motional emf induced in the rod?A the moving rod has a resistance of 0.25 Ω and moves on rails 20.0 cm apart. The stationary U-shaped conductor has negligible resistance. When a force of 0.410 N is applied to the rod, it moves to the right at a constant speed of 1.50 m/s. What is the magnetic field?A square loop of wire with sides of 20.0cm is half in and half out of a uniform magnetic field which points out of the page as shown. The loop is moving with a speed of 3.00m/s and the strength of the magnetic field is 0.100Tesla. The total resistance of the loop is 4.00Ω. Find the magnitude and directionof the current if the loop is moving in the following directions. a.in the +x direction b.in the -x direction c.in the +y direction d.in the -y direction