Answered: A sheet of copper is placed between the… | bartleby

Related questions

Question

A sheet of copper is placed between the poles of an electromagnet
with the magnetic field perpendicular to the sheet. When the sheet
is pulled out, a considerable force is required, and the force required
increases with speed. Explain. Is a force required also when the sheet is
inserted between the poles? Explain.

Expert Solution

Trending now

This is a popular solution!

Step by step

Solved in 2 steps

SEE SOLUTION Check out a sample Q&A here

Blurred answer

Similar questions

You are assigned the job of building a very sensitive magnetic scale. Objects are hung from a horizontal rod through which an electric current is directed from left to right. The rod is loosely attached to a pair of vertical rails that allow it to slide up and down with almost no resistance. The entire scale is placed in an external magnetic field, and the current is adjusted until the rod and object levitate, balancing the downward gravitational force with an upward magnetic force. B? 1. In which direction must the external magnetic field point in order for your scale to work? 2. What current is needed to balance the scale if the combined mass of the rod and object is 1 kg, the length of the wire is 1 meter, and the magnitude of the external magnetic field is 0.1 Tesla?
15. A 52uC charge particle moves parallel to a long wire with a speed of 720 m/s. The separation between the particle and the wire is 13 cm, and the magnitude of the force exerted on the particle is 1.4 x 10-7. Find the magnitude of the magnetic field at that point, and the current in the wire.
3) A long straight wire carries a current of 1.3 A. An electron is 2.3 cm from the wire and initially moving at speed 7.2 x 106 m/s in the opposite direction as the current in the wire. a) The electron is moving in the magnetic field from the wire. Calculate the magnitude of the magnetic force on the electron. b) Which of the following correctly describes the direction of the magnetic force on the electron? A) The magnetic force on the electron is directed toward the wire B) The magnetic force on the electron is directed away from the wire
Two long, straight wires are parallel and 16 cm apart. Hint a. If each wire carries a current of 65 A in the same direction, what is the magnetic force per meter exerted on each wire? The force per meter is N/m. (Use the "E" notation to enter your answer in scientific notation. For example, to enter 3.14 × 10 12 enter "3.14E-12".) b. Does the force pull the wires together or push them apart? The force Select an answer c. What is the magnitude and direction of the force per unit length if the currents flow in opposite directions? The force per meter is N/m and the force Select an answer (Use - 12 the "E" notation to enter your answer in scientific notation. For example, to enter 3.14 x 10 enter "3.14E-12".)
A long straight wire length 6.5 metres has a current of 3.5 amps flowing through it. The wire is in an external magnetic field of 16.2 mT. Calculate the magnitude of the force on the wire in Newtons, to 2 significant figures
13. You have the apparatus shown in Figure P21.13. A circular metal plate swings past the north pole of a permanent magnet. The metal consists of a series of rings of in- creasing radius. Indicate the direction of the current in one ring (a) as the metal swings down from the left into the magnet- ic field and (b) as the metal swings up to- ward the right out of the magnetic field. Use Lenz's law to justify your answers. Figure P21.13 Metal plate Magnet N
I need help with this question. Thanks!