A researcher would like to perform an experiment in a zero magnetic field, which means that the field of the earth must be canceled. Suppose the experiment is done inside a solenoid of diameter 1.0 m, length 4.0 m , with a total of 5000 turns of wire. The solenoid is oriented to produce a field that opposes and exactly cancels the 52 µT local value of the earth's field. Part A What current is needed in the solenoid's wires? Express your answer with the appropriate units. HA ? I = Value Units Submit Request Answer < Return to Assignment Provide Feedback

A researcher would like to perform an experiment in a zero magnetic field, which means that the field of the earth must be canceled. Suppose the experiment is done inside a solenoid of diameter 1.0 m, length 4.0 m , with a total of 5000 turns of wire. The solenoid is oriented to produce a field that opposes and exactly cancels the 52 µT local value of the earth's field. Part A What current is needed in the solenoid's wires? Express your answer with the appropriate units. HA ? I = Value Units Submit Request Answer < Return to Assignment Provide Feedback

College Physics

11th Edition

ISBN:9781305952300

Author:Raymond A. Serway, Chris Vuille

Publisher:Raymond A. Serway, Chris Vuille

Chapter1: Units, Trigonometry. And Vectors

Section: Chapter Questions

Problem 1CQ: Estimate the order of magnitude of the length, in meters, of each of the following; (a) a mouse, (b)...

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Part C Is this value of magnetic field cause for worry? Yes. Since this field is much greater than the earth's magnetic field, it would be expected to have more effect than the earth's field. Yes. Since this field does not differ a lot from the earth's magnetic field, it would be expected to have almost the same effect as the earth's field. No. Since this field does not differ a lot from the earth's magnetic field, it would be expected to have almost the same effect as the earth's field. No. Since this field is much smaller than the earth's magnetic field, it would be expected to have less effect than the earth's field.
Consider two magnetic fields B1 and B2, with components B1x = 0, B1y = 2ax, and B1z = 0 and B2x = -ay, B2y = ax, and B2z = 0, respectively, where a is a constant. a. Draw a picture of each field. (Hint: Show that the second field points circularly around the origin. How does its magnitude depend on the distance from the origin?) b. Show that these fields have the same curl everywhere. c. Consider the following statement: "If we know a magnetic field's curl at all points, we can determine the magnetic field at all points." In light of what you have discovered above, why is this statement false?
4. A square loop of wire of side 0.20 m has a total resistance of 0.60 2. The loop is positioned in a uniform magnetic field of 0.03 T directed into the page, as shown in the figure below. B (into page) X X X X X x X X X X X X X X X X -0.20 m- a Calculate the magnetic flux through the loop. The magnetic field strength now increases uniformly to 0.20 T in 0.50 s. b. Calculate the emf induced in the loop during this period. c. Calculate the current in the loop during this period. d. What is the direction of the current in the loop (clockwise or counterclockwise)? Justify your answer. 0.20 m
Hey I am doing some physics homework and am stumped on this question. Any help will be great! Thanks!
In (Figure 1), the rod moves with a speed of 1.3 m/s on rails 33.0 cm apart. The rod has a resistance of 2.6 . The magnetic field is 0.36 T, and the resistance of the U-shaped conductor is 21.0 at a given instant. ▼ Part A Calculate the induced emf. Express your answer to two significant figures and include the appropriate units. E = Submit Part B I = Submit Part C μA Calculate the current in the U-shaped conductor. Express your answer to two significant figures and include the appropriate units. F = Value Submit Request Answer μA Value Request Answer LuA Units Calculate the external force needed to keep the rod's velocity constant at that instant. Express your answer to two significant figures and include the appropriate units. Value Request Answer Units ? Units ? ?
A metal detector with two coils (an exciter and a detector) is an example of an active detection system. Suppose a metallic coin (which is non-magnetic on its own, but can have a magnetic field induced by an exciter coil) is lost under the sand at the beach. Part A The exciter coil would use electric current. The detector coil will detect a signal from the lost coin under the sand because $E - al = an AC, at O an AC, $B · Əl = µo(I + e, E) at a DC, at $B· al = µo(1 + €o a DC, at
Part A The circuit of (Eigure 1) is a square 30 cm on a side. The magnetic field increases steadily from C T to 0 70 T in 13 ms. What is the current in the resıstor during this time? For the steps and strategies involved in solving a similar problem you may view a Video Tutor Solution Express your answer with the appropriate units. HA ? Submit Request Answet Figure 1 of 1 Prov de Feedback 20 N 9.0 V
To construct a solenoid, you wrap insulated wire uniformly around a plastic tube 8.9 cm in diameter and 45 cm in length. You would like a 3.2 AA current to produce a 2.6 kGkG magnetic field inside your solenoid. Part A What is the total length of wire you will need to meet these specifications? Express your answer using two significant figures.
Two coils with iron cores are positioned as shown in the figure. The smaller coil is part of a circuit with a battery and a switch. Immediately after the switch Sis closed, which one of the following statements is true? O A magnetic field that points away from the smaller coil appears inside the larger coil. O An induced current will flow from right to left in R. O A magnetic field that points away from the larger coil appears inside the smaller coil. O A current will pass through r, but there will be no current through R. O An induced current will flow from left to right in R.
In a physics laboratory experiment, a coil with 200 turns enclosing an area of 14.0 cm² is rotated during the time interval 3.90×10-2 s from a position in which its plane is perpendicular to Earth's magnetic field to one in which its plane is parallel to the field. The magnitude of Earth's magnetic field at the lab location is 5.50x10-5 T. Part A What is the magnitude of the magnetic flux (initial) through the coil before it is rotated? Express your answer numerically, in webers, to at least three significant figures. ► View Available Hint(s) | ΑΣΦ |Pinitial = 0 Submit X Incorrect; Try Again; 4 attempts remaining Part B final Submit Previous Answers What is the magnitude of the magnetic flux final through the coil after it is rotated? Express your answer numerically, in webers, to at least three significant figures. ► View Available Hint(s) Part C = 0 Wb Correct Submit Previous Answers average induced emf = Provide Feedback What is the magnitude of the average emf induced in the coil?…
A 40.0 cm -long solenoid 1.35 cm in diameter is to produce a field of 0.320 mT at its center. Part A How much current should the solenoid carry if it has 800 turns of wire? I= A
In a physics laboratory experiment, a coil with 250 turns enclosing an area of 12.9 cm² is rotated during the time interval 4.80×10-² s from a position in which its plane is perpendicular to Earth's magnetic field to one in which its plane is parallel to the field. The magnitude of Earth's magnetic field at the lab location is 5.40x10-5 T. Part A What is the magnitude of the magnetic flux (initial) through the coil before it is rotated? Express your answer numerically, in webers, to at least three significant figures. ► View Available Hint(s) ΟΙ ΑΣΦ |Pinitial | = Submit Part B |Pfinal Submit What is the magnitude of the magnetic flux final through the coil after it is rotated? Express your answer numerically, in webers, to at least three significant figures. ► View Available Hint(s) VG ΑΣΦ = = w ? Wb ? Wb Review | Constants