An electron microscope uses electrons that are accelerated tospeeds of 30000m/s.

Question

An electron microscope uses electrons that are accelerated tospeeds of 30000m/s.The electrone than sent perpendicularly throughanother electric field produced between two plastec 1.00cm apartwith potential difference of 12,000volts.determine: i)The strength(electric field intensity of the electric fieldbetween the plastes and the magnetic field strenth. ii)required to keep the electrons moving in a straight linethrough the electric field i)The strength(electric field intensity of the electric fieldbetween the plastes and the magnetic field strenth. ii)required to keep the electrons moving in a straight linethrough the electric field

Explanation / Answer

Speed v = 30000 m / s otential difference V = 12000 V distance S = 1 cm =0.01 m electric field E = V / S                       = 12 * 10 ^ 5 V / m Magnetic field B = E / v                          = 40 T

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