an electron with a velocity of 1.0 x 10 ^ 4 m / s within a radius of 2.0 cm in an electromagnet. magnetic?
Range of solenoid valves is perpendicular to the plane of the path of the electron. the strength of the magnetic field and the current in the coil when it has 25 turns per inch
for electron in circular orbit describe> is required for centripetal (mv ^ 2 / r) by the magnetic force must be provided (Lorentz] qvB sin 90 = mv ^ 2 / r B = mv / qr B mag = field = 9.1 * 10 ^ -31 * 1.0 * 10 ^ 4 / 1.6 * 10 ^ -19 * 0.02 B = 2.844 * 10 ^ -6 Tesla ———– —————– B = Solenoid = uo [n] * I n = U / Length = 25/0.01 = 2500 reads / m uo = 4 * pi * 10 ^ -7 I = B / (uo * 2500) = 2.844 * 10 ^ -6 / (4 * 3.14 * 10 ^ -7 * 2500) I = 9 * 10 ^ -4 ampere = 0.91 milliamps
Magnetic field in a solenoid
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