• D 9. In above figure, the current through each coil is 3.0 A. Each side has 200 turns of 0.20 m diameter coils. What is the magnetic field at midpoint between coils along the axis?
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- •35 A 13.0 g wire of length L = 62.0 cm is suspended by a pair of flexible leads in a uni- form magnetic field of magni- tude 0.440 T (Fig. 28-40). What are the (a) magnitude and (b) direction (left or right) of the current required to remove the tension in the supporting leads? ILW1. A circular current loop of 3 turns has radius 0.2 m and current 5 A. a. The current loop shown will act like a magnet. Which is true of the poles? • The north pole is below the current loop and the south pole is above. The north pole is above the current loop and the south pole is below. The north pole is out of the page and the south pole is into the page. • The north pole is into the page and the south pole is out of the page. • b. What is the direction of the magnetic dipole moment of the loop? Use the legend to indicate direction. C. What is the magnitude of the magnetic dipole moment of the current loop? d. The magnetic field along the axis of the current loop is 8₁ at a distance z₁ from the plane of the loop. What is the magnetic field at a distance 22₁ from the plane of the loop? Assume 2₁ » R and that there are no other sources of magnetic fields. (">>= "much greater than"). • 8₁/8 8₁ 8₁/4 • 28₁ • 8₁/2 • 48₁ • 8₁/√2 • 88₁ e ho g h a (out) i (in) i k zeroTwo wires carry equal currents in opposite directions, as in (Figure 1). The field is 2.0 mT at a point below the lower wire. The distance between the wires is twice the distance between this point and the lower wire. Part BWhat is the strength of the field at point 1? Part D What is the strength of the field at point 2?
- •P А. В. d D ° Now we're viewing a cross-section of a solenoid that has n turns per unit length and a current I. The solenoid is very long – we can consider it to be infinitely long for our purposes – and the individual colds are very tightly packed. a. What's the direction of the magnetic field inside the solenoid? (Hint: use your knowledge of the field produced by currents to vector-add the fields at each point.) You can write your answer here or upload a picture of your drawn arrows. b. How does the magnitude of the magnetic field vary from point A to point B? What about from point C to point D? The magnetic field outside the solenoid (e.g. at point P) is zero. Explain why this makes sense. Draw an Amperian loop that includes points A and P. What shape of a loop makes sense to use, for the purpose of finding the magnetic field at point A? Explain why you chose the shape you chose. d. Use Ampere's law to find the magnitude of the magnetic field at point A inside the solenoid. С. е.…A motor run by a 7.9-V battery has a 17-turn square coil with sides of length 3.4 cm and total resistance 26 2. When spinning, the magnetic field felt by the wire in the coil is 0.030 T. What is the maximum torque on the motor? Express your answer to two significant figures and include the appropriate units. T= 0.00027 N•m Submit Previous Answers Request Answer ? X Incorrect; Try Again; 4 attempts remainingQ1) In free space , an infinite sheet of current at v=0, with k=10ax A/m and an infinite current filament intensity at i) (0,2,0), ii) (0,-2,0). of 8A in az direction at x-0, y=4. Find the magnetic field
- = In the three separate arrangements (a), (b), and (c) shown below a current i 11 A is set up in a long conductor formed by bending a wire into a semicircle/circle of radius R = 25 cm. Find the magnetic field at points 1, 2, and 3? Use out of the page as the positive direction. (a) (b) (c) • — i The magnetic field at '1', B₁ = = The magnetic field at '2', B2 The magnetic field at '3', B3 = 2 Units HT Units HT Units uT 3.•• A 50-cm-long, 10-cm-diameter solenoid creates the uniform magnetic field for an experiment in which electrons undergo cyclotron motion with a frequency of 550 MHz. The solenoid has 2000 turns of wire. What is the current through the solenoid?