Very briefly describe the way an electromagnet works.
1 answer:
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Answer:
Explanation:
The energy of a photon of light can be calculated from the following equation;
where his Planck's constant and is given by,
f is the frequency of the light and is given by
So therefore,
Strength of the magnetic field: C) 20 T
Explanation:
When a conductive wire moves in a region with magnetic field, an electromotive force is induced in the wire due to the phenomenon of electromagnetic induction.
If the wire moves perpendicular to the field, the magnitude of the induced emf in the wire is given by
where
B is the strength of the magnetic field
L is the length of the wire
v is the speed of the wire
For the wire in this problem, we have:
is the emf induced in the wire
v = 3.0 m/s is the speed of the wire
L = 0.20 m is its length
Solving for B, we find the strength of the magnetic field:
Learn more about magnetic fields:
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Answer:
Air kerma
Explanation:
The acronym for the word 'kerma' is . It is the sum or the total of the kinetic energies of the
that is liberated by the uncharged ionizing radiation in the small sample of a matter, and is divided by the mass of that sample.
It is sometimes used for expressing the radiation concentration that is delivered to a point.
It is used to specify the intensity of the x-rays for any given point in the air at some known distance form the local spot. The total air kerma can be monitored in the fluoroscopic procedure.