"Optimal Electromagnet Shape to Attract a Steel Ball. I have an application where I need an electromagnet that generates a pull force on a ~10mm diameter steel ball that is initially ~10mm from the electromagnet. For a single coil electromagnet with a fixed number of turns and current, is there a core shape that provides the highest attraction force versus distance for a steel ball of a given diameter?"
Damien Horton
Answered question
2022-07-22
I have an application where I need an electromagnet that generates a pull force on a ~10mm diameter steel ball that is initially ~10mm from the electromagnet.
For a single coil electromagnet with a fixed number of turns and current, is there a core shape that provides the highest attraction force versus distance for a steel ball of a given diameter?
Answer & Explanation
Coleman Ali
Beginner2022-07-23Added 13 answers
Note that with time, both the core and the ball will tend to become magnetized, causing the ball to stick in place even after the coil is disconnected. You can cancel this tendency by reversing the polarity of the coil connections with each successive energization of the coil, but this requires some smarts in the drive circuit for that coil.
New Questions in Electromagnetism
The magnetic field inside a long straight solenoid carrying current
A)is zero
B)increases along its radius
C)increases as we move towards its ends
D)is the same at all pointsWhich of the following units is used to express frequency?
Hertz
Watt
Newton
PascalWhat does tangential force produce?
How Many Different Orbitals Are There?
What is value for electrons ?
Which of the following correctly describes the magnetic field near a long straight wire?
A. The field consists of straight lines perpendicular to the wire
B. The field consists of straight lines parallel to the wire
C. The field consists of radial lines originating from the wire
D. The field consists of concentric circles centered on the wireIs energy directly proportional to frequency?
What is a compass? How is a compass used to find directions?
Magnetic field lines never intersect each other because
There will be two directions of the field at the same point.
Feild lines repel each other
Field lines follow discrete paths only
If field lines intersect they create a new magnetic field within the existing fieldTwo parallel wires carry currents of 20 A and 40 A in opposite directions. Another wire carrying a current antiparallel to 20 A is placed midway between the two wires. The magnetic force on it will be
Towards 20 A
Towards 40 A
Zero
Perpendicular to the plane of the currentWhat is the wavelength of the light emitted when an electron in a hydrogen atom undergoes transition from the energy level n = 4 to energy level n = 2? What is the colour corresponding to their wavelengths? (Given )
A) 486 nm, Blue
B) 576 nm, Blue
C) 650, Blue
D) 450 nm, BlueTwo identical conducting spheres A and B are separated by a distance greater than their diameters the spheres carry equal charges and electrostatic force between them is F a third identical uncharged sphere C is first brought in contact with A, then with B and finally removed as a result, the electrostatic force between A and B becomes
Why is alternating current used in homes?
Which of the following radiation has the shortest wavelength.
X-ray
Infra red
microwave
ultravioletHow to find the local extrema for ?
