How is a magnetic field generated?
onthewevd
Open question
2022-08-19
Answer & Explanation
riveExedeer
Beginner2022-08-20Added 5 answers
For example, a current constitutes moving charges and I hope you might be familiar with the concept of an electromagnet which is a magnetic field being generated around a current carrying conductor on account of moving charges inside it.
When you consider a bar magnet. The tiny electrons moving inside the atoms of the magnet are so arranged that the effects due to each electron is added up to form a noticeable magnetic field.
Another source of magnetic field is an electric field changing with time, i.e. a time varying electric field.
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?
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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?
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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
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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
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Which of the following radiation has the shortest wavelength.
X-ray
Infra red
microwave
ultravioletHow to find the local extrema for ?
