What is the magnetic field (magnitude and direction) at point P if a = 2 cm, b = 5 cm, and I = 4 A? The direction of the current is indicated with the arrows. For direction, use positive for into the page and negative for out of the page. a
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- 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 ? ?Find the direction of the magnetic field at each of the indicated points. What is the direction of the magnetic field Bc at Point C? O Bc is out of the page. O Bc is into the page. O Bc is neither out of nor into the page and Bc + 0. O Bc = 0. Figure 1 of 2 Part D What is the direction of the magnetic field Bp at Point D? A O Bp is out of the page. O Bp is into the page. O Bp is neither out of nor into the page and BD # 0. O BD = 0Please solve the question correctly and also be sure to give the correct units. Thank you!
- A loop of wire is perpendicular to a magnetic field. The magnetic field strength as a function of timeis given by the top graph. Draw a graph of the current in the loop as a function of time. Let apositive current represent a current that comes out of the top of the loop and enters the bottom of theloop. There are no numbers for the vertical axis, but your graph should have the correct shape andproportions.An infinitely long, straight, cylindrical wire of radius R has a uniform current density J = Jî in cylindrical coordinates. What is the magnitude of the magnetic field at some point inside the wire at a distance r; < R from the wire's central Cross-sectional view axis? Express your answer in terms of R, r;, µo, and J. J B = Side view Assuming J is positive, what is the direction of the magnetic field at some point inside the wire? O positive z-direction negative z-direction positive r-direction negative r-direction positive p-direction negative p-directionA circular closed, conducting loop of radius r is in the presence of a uniform magnetic field that points into the page, shown in the figure below. The strength of the magnetic field changes as a function of time, which is described by the following expression: B(t) = B1t? + Bo. You may assume that B1 and Bo are both positive numbers. The direction of the magnetic field stays constant. The total resistance of the conducting loop is R. Use this information to solve parts (a) - (d). Write your answers in terms of known quantities such as: r, R, B1, Bo, and t. B(t) = B,t? + Bo %3D R r (a) Write an expression for the magnetic flux through the loop, assuming that the area vector of the loop points out of the page. Is the flux increasing or decreasing over time? (b) Determine the magnitude of the induced electromotive force driven through the loop. (c) Determine the magnitude of the induced current driven through the loop. (d) In which direction does the induced current flow (clockwise or…
- Two long straight current carrying wire both have currents of 235 A directed to the right. The wires are laid parallel to one another and are separated by a distance of 0.028 m. What is the net magnetic field at a distance of 0.02 m above the top wire? Enter a number rounded to 4 decimal placesWhat is the magnetic field at P due to the current I in the wire shown? Give your answer in terms of given variables (a, b, and I) and physical and numerical constants (uo and T and/or ke and c). a Hint Magnetic field points Select an answer v and has magnitude · (Format hint: Spell out Greek letters and use underscore ("_") for subscripts. For example, to type in lo, type in "mu_0".)A current i = 2.0 A flows in a long straight wire and in a circular loop as indicated in the figure below. If the distance a = 3.0 cm, what is the magnitude of the magnetic field at point P at the center of the loop? Express your answer to the nearest µT.