A constant current flowing through a loop: does this case fall under the magnetostatic case? Write two equations that describe the magnetostatic case.
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A constant current flowing through a loop: does this case fall under the magnetostatic case? Write two equations that describe the magnetostatic case.
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- What is the force per meter on a lightning bolt at the equator that carries 16000 A perpendicular to the Earth's 3.20x10-5-T field? What is the direction of the force if the current is straight up and the Earth's field direction is due south, parallel to the ground? E W Straight up Straight down No forceThe North Pole of a bar magnet enters a coil of wire. What are the directions of the induced current and magnetic field? Draw a sketch of the situation.Suppose you wish to produce a 1-T magnetic field in a toroid with an iron core for which magnetic susceptibility is x = 3 x 10³. The toroid has a mean radius of 14 cm and is wound with 600 turns. Hint a. What current is required to produce this magnetic field in the iron core? Current of b. For comparison, what current is required to produce the same magnetic field in an air-filled toroid of same geometry? Current of A is needed. Submit Question A is needed for toroid with no iron core. While it is not always practical to have region of magnetic field filled with ferromagnetic materials, this dramatic increase in strength of magnetic field produced is useful in some applications you will see in upcoming chapters. Question Help: Message instructor
- The figure shows a cross section of three very long parallel wires, eachcarrying a current of 2.0 A. The currents in the top and bottom rightwires are coming out of the page; the current of the bottom left wire isgoing into the page. The length of each leg of the triangle is R = 18.0mm.a) Draw a clear physics diagram of the problem with forces, fields, andimportant angles labeled.b) Find the magnitude and direction of the magnetic force on a 4.0-mlength of the top wire due to the bottom right wire.c) Find the total magnitude and direction of the magnetic force on a 4.0-mlength of the top wire due to the other two wires.d) Find the total magnitude and direction of the magnetic force on a 4.0-mlength of the bottom left wire due to the other two wires.A square loop of current is in a magnetic field. a. If the field is uniform, is there always a net force, never a net force, or sometimes a net force? Explain or prove your answer mathematically. If you said sometimes, explain under what circumstances you get a net force and under what circumstances you do not get a net force. b. If the field is NOT uniform, is there always a net force, never a net force, or sometimes a net force? Explain or prove your answer mathematically. If you said sometimes, explain under what circumstances you get a net force and under what circumstances you do not get a net force.A bar magnet falls through a loop connected to a galvanometer as shown in the figure. Which of the following statements is true? N The galvanometer needle will deflect to the right, then to the left. The galvanometer needle will not deflect at all. The galvanometer needle will deflect to the right. The galvanometer needle will deflect to the left, then to the right.
- A current I is passed through a wire. A second wire of length L is moving perpendicular to the magnetic field generated by the first wire (see sketch below) with velocity v at a distance d. Consider the magnetic field B to be constant over the range / of motion of the second wire (i.e. d > 1). You need to calculate the potential generated between the ends of the second wire. Please select statements that would describe your approach to solving the problem. Wire 1 Wire 2 d a. Use an expression for the electromotive force (EMF) induced by the magnetic field. b. Use the expression for the magnetic force between two current-carrying wires. C. Use the expression for the magnetic field of a current-carrying wire.A loop of wire carries a current (provided by a battery which is not shown) next to a bar magnet. The magnet is repelled from the loop. Which way does current run in the loop? Cannot determine, we need to know if the flux is changing. Out of the page on the top, Into the page on the bottom. Into the page on the top, Out of the page on the bottom.The three conducting rings in the figure are all in the same plane as a long wire. The wire has a current / that is steadily decreasing with time at a constant rate. What can you say about the induced electromotive force in each of the rings A, B, and C? A O No electromotive force is induced in any of the rings. O A counter-clockwise electromotive force is induced in ring A, but a clockwise electromotive force is induced in rings B and C. O A clockwise electromotive force is induced in ring A. Ring B has no induced electromotive force, and ring C has a counterclockwise electromotive force. O All rings have a counterclockwise induced electromotive force. O A counter-clockwise electromotive force is induced in ring A. Ring B has no induced electromotive force, and ring C has a clockwise electromotive force.