Part A The loop in (Figure 1) is being pushed into the 0.10 T magnetic field at 25 m/s. The resistance of the loop is 0.10 Ω. What is the magnitude of the current in the loop? Express your answer with the appropriate units. HA 3.75 A Submit Previous Answers Request Answer X Incorrect; Try Again; 4 attempts remaining Part B Figure < 1 of 1 What is the direction of the current in the loop? O clockwise counterclockwise Submit Previous Answers v Correct Here we learn how to use Lenz's law to determine the direction of the current induced in the loop. 5.0 cm
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- Constants A circular coil 15.0 cm in diameter and containing nine loops lies flat on the ground. The Earth's magnetic field at this location has magnitude 5.00 x 10-5 T and points into the Earth at an angle of 53.0 ° below a line pointing due north. A 6.90-A clockwise current passes through the coil. Part A Determine the torque on the coil. Express your answer using three significant figures and Include the appropriate units. HA 132 N•m Submit Previous Answers Request Answer X Incorrect; Try AgainA slender rod with a length of 0.300 m rotates with an angular speed of 8.00 rad/s about an axis through one end and perpendicular to the rod. The plane of rotation of the rod is perpendicular to a uniform magnetic field with a magnitude of 0.600 T Part A What is the induced emf in the rod? Express your answer in volts. E = ΜΕ ΑΣΦ ← ? Submit Request Answer Part B What is the potential difference between its ends? Express your answer in volts. V= Ο ΑΣΦ Submit Request Answer Part C V V Suppose instead the rod rotates at 8.00 rad/s about an axis through its center and perpendicular to the rod. In this case, what is the potential difference between the ends of the rod? Express your answer in volts. V = ΤΟ ΑΣΦ འ ? Submit Request Answer Part D V Suppose instead the rod rotates at 8.00 rad/s about an axis through its center and perpendicular to the rod. In this case, what is the potential difference between the center of the rod and one end? Express your answer in volts. V = ΤΟ ΑΣΦ Submit…part a and b
- A motor run by a 7.8-V battery has a 15-tum square coil with sides of length 5.4 cm and total resistance 202. When spinning, the magnetic field felt by the wire in the coil is 0.028 T. ▼ Part A What is the maximum torque on the motor? Express your answer to two significant figures and include the appropriate units. T=4.7.10 4 μA Provide Feedback N Submit Previous Answers Request Answer MacBook Air m X Incorrect; Try Again; 3 attempts remaining 2 G RevieB7a. The magnitude of the magnetic field at a distance R from a long straight wire is equal to B. At what distance will the magnitude of the magnetic field be equal to 3B? b. Two long parallel wires carry equal but opposite currents. Are there any points in space where the total magnetic field is equal to zero? If so, where? If not, why not? C. A simple loop circuit contains two sources, a resistive wire, and a switch. It is placed next to a long straight wire carrying a steady current. As soon as the switch is closed, the loop is suddenly pulled towards the long wire. Which source has a greater emf? Justify your answer. eHe E2
- 1) A straight, stiff, horizontal wire of length 48 cm and mass 28 g is connected to a source of emf by light, flexible leads. A magnetic field of 1.33 T is horizontal and perpendicular to the wire. Find the current necessary to float the wire, that is, find the current for which the magnetic force balances the weight of the wire. A Submit You currently have 0 submissions for this question. Only 10 submission are allowed. You can make 10 more submissions for this question.6. A wire is formed so as to make a circular loop connecting two long, straight sections as shown in Figure 6. If the radius of the loop is R = 20 cm and the wire carries a current I = 2.4 A, what are the magnitude and direction of the magnetic field at the center of the loop? I If needed, you can use the magnetic field due to a straight wire, and and the magnetic field at the center of a loop derived from Ampere's law. (Hint: The two long sections form one long straight current- carrying wire.)A circular coil 15.0 cm in diameter and containing nine loops lies flat on the ground. The Earth's magnetic field at this location has magnitude 5.00 x 10-5 T and points into the Earth at an angle of 53.0 ° below a line pointing due north. A 6.90-A clockwise current passes through the coil. Part A Determine the torque on the coil. Express your answer using three significant figures and include the appropriate units. HA Value Units Submit Request Answer
- The earth's magnetic field, with a magnetic dipole moment of 8.0 x 1022 A m², is generated by currents within the molten iron of the earth's outer core. Suppose we model the core current as a 3000-km-diameter current loop made from a 1000-km-diameter "wire." The loop diameter is measured from the centers of this very fat wire. ▼ Part B What is the current density J in the current loop? Express your answer to two significant figures and include the appropriate units. J = Submit Part C Лоор Jwire μA Value Submit Request Answer To decide whether this is a large or a small current density, find the ratio of the current density J in the current loop to the current density of a 3.0 A current in a 1.0-mm-diameter wire. Express your answer using two significant figures. 17 ΑΣΦ VO Units Request Answer ? ?A small bar magnet experiences a 1.60×10-2 N. m torque when the axis of the magnet is at 45.0° to a 6.00×10-2 T magnetic field. Part A What is the magnitude of its magnetic dipole moment? Express your answer in ampere meteres squared. VGI ΑΣΦ Submit Request Answer 2) ? A.m²A small, square loop carries a 40 A current. The on-axis magnetic field strength 41 cm from the loop is 6.3 nT. Part A What is the edge length of the square? Express your answer to two significant figures and include the appropriate units. L = ΜΑ Value Submit Request Answer Units ?