Gauge Magnetic
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Conceptual Physics questions ... I just want to see if my answers are correct ..?
# 1. If a mile of 24 gauge copper has a resistance of 0.14 kΩ and the resistance of copper is 1.7 x 10 ^ 8 Ωm, what is the diameter of the wire? (Assume a mile = 1.6 km) # 2. A proton is accelerated from rest through a potential difference of 150V. It then enters a uniform magnetic field region and moves in a circle (radius = 12 cm). What is the magnitude of the magnetic field in this region? # 3. A positively charged particle has a velocity in the negative z direction at point P. The magnetic force on the particle at this point is in the negative direction. What is the magnetic field at point P? if you could show me formulas / work for everyone who really help me ... thanks!
2). (1 / 2) mv ^ 2 V = e ---> v = (2 V e / m) ^ (1 / 2) = 169.500 m / s ev B = (mv ^ 2) / r ---> B = mv / er = 14.7 * 10 ^ -3 T 3) F = qvx B ---> | F | (-j) = qv ( -k) x (Bx + Bz i and j + k) Bx> = 0, 0, Bz =? 1) R = rL/S--> S = r L / R = 1.7 * 10 ^ -8 * 1.6 * 10 ^ 3 / 140 = 1.94 * 10 ^ -7 m ^ 2 S = pi (d ^ 2) / 4 ---> d = (4 S / pi) ^ (1 / 2) = 5 * 10 ^ -4 m
Magnetic level gauge
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