m 0 N 2 A / l
... • Consider a solenoid of length l with N windings and radius r (Area A=p r2). • A current I produces a magnetic field in the solenoid of B = m0 N I / l • This produces a total flux through each winding of = A B = (m0 N A / l ) I – Define the Inductance L = (m0 N2 A / l ) (not a length!!) • If the ...
... • Consider a solenoid of length l with N windings and radius r (Area A=p r2). • A current I produces a magnetic field in the solenoid of B = m0 N I / l • This produces a total flux through each winding of = A B = (m0 N A / l ) I – Define the Inductance L = (m0 N2 A / l ) (not a length!!) • If the ...
3. (a) The force on the electron is Thus, the magnitude of FB is 6.2
... to repeating the above computation with a change in the sign in the charge. Thus, FB has the same magnitude but points in the negative z direction, namely, ...
... to repeating the above computation with a change in the sign in the charge. Thus, FB has the same magnitude but points in the negative z direction, namely, ...
Document
... a DC current and place a compass near the electromagnet. Your screen should look something like what you see to the right, on Screen 1. Using the slider on the battery, observe how changing the voltage changes the current flow and what happens to the compass needle. Write down your observations rega ...
... a DC current and place a compass near the electromagnet. Your screen should look something like what you see to the right, on Screen 1. Using the slider on the battery, observe how changing the voltage changes the current flow and what happens to the compass needle. Write down your observations rega ...
A wave is a wave is a wave
... changes the direction of the magnetic field and so magnetizes the ferromagnetic material in a different direction ...
... changes the direction of the magnetic field and so magnetizes the ferromagnetic material in a different direction ...
Physics 836: Problem Set 7 Due Wednesday, June 1 by 5PM
... (b) Find the current density J everywhere inside the slab. 2. Consider a superconducting sphere of radius a in an applied magnetic field H. Suppose that the penetration depth λ ¿ a, so that the magnetic field can be regarded as excluded from the sphere. (a). Calculate the B field outside the sphere. ...
... (b) Find the current density J everywhere inside the slab. 2. Consider a superconducting sphere of radius a in an applied magnetic field H. Suppose that the penetration depth λ ¿ a, so that the magnetic field can be regarded as excluded from the sphere. (a). Calculate the B field outside the sphere. ...
Magnetism 1. Which of the following does not create a magnetic field?
... B) They are related, but only by the fact that they can be used to measure things about circuits. C) They are, in fact, the same instrument, just calibrated to measure different quantities. 20. You are making a simple galvanometer to use as a voltmeter. You can select either a thin or thick wire to ...
... B) They are related, but only by the fact that they can be used to measure things about circuits. C) They are, in fact, the same instrument, just calibrated to measure different quantities. 20. You are making a simple galvanometer to use as a voltmeter. You can select either a thin or thick wire to ...
PHYS 6000 C01, Spring 2003
... 4. A circular loop has radius R and carries current I2 in a clockwise direction. The center of the loop is a distance D above a long, straight wire. What are the magnitude and direction of the current I1 in the wire if the magnetic filed at the center of the loop is zero? 5. In an L-R-C series circu ...
... 4. A circular loop has radius R and carries current I2 in a clockwise direction. The center of the loop is a distance D above a long, straight wire. What are the magnitude and direction of the current I1 in the wire if the magnetic filed at the center of the loop is zero? 5. In an L-R-C series circu ...
Electromagnet
An electromagnet is a type of magnet in which the magnetic field is produced by an electric current. The magnetic field disappears when the current is turned off. Electromagnets usually consist of a large number of closely spaced turns of wire that create the magnetic field. The wire turns are often wound around a magnetic core made from a ferromagnetic or ferrimagnetic material such as iron; the magnetic core concentrates the magnetic flux and makes a more powerful magnet.The main advantage of an electromagnet over a permanent magnet is that the magnetic field can be quickly changed by controlling the amount of electric current in the winding. However, unlike a permanent magnet that needs no power, an electromagnet requires a continuous supply of current to maintain the magnetic field.Electromagnets are widely used as components of other electrical devices, such as motors, generators, relays, loudspeakers, hard disks, MRI machines, scientific instruments, and magnetic separation equipment. Electromagnets are also employed in industry for picking up and moving heavy iron objects such as scrap iron and steel.