(a) What is the speed of the ? -particle? _________m/s (b) What is the magnitude
ID: 1267529 • Letter: #
Question
(a) What is the speed of the ?-particle?
_________m/s
(b) What is the magnitude of the magnetic force on it?
_________N
(c) What is the radius of its circular path?
_________m
2)
magnitude____________N
direction____________ north/south/east/west
3) A 45-m length of wire is stretched horizontally between two vertical posts. The wire carries a current of 68 A and experiences a magnetic force of 0.15 N. Find the magnitude of the earth's magnetic field at the location of the wire, assuming the field makes an angle of 69.5
magnitude____________N
direction____________ north/south/east/west
3) A 45-m length of wire is stretched horizontally between two vertical posts. The wire carries a current of 68 A and experiences a magnetic force of 0.15 N. Find the magnitude of the earth's magnetic field at the location of the wire, assuming the field makes an angle of 69.5
Explanation / Answer
1
If the speed isn't relativistic (and it isn't),
kinetic energy gained = 1/2 mv^2
=
potential energy lost = qV
Solve for the speed:
v = sqrt (2qV/m)
They give you the charge (q, in units of e). Look up the fundamental charge (e). They give you the potential difference(V) and mass(m).
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