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An %u03B1-particle has a charge of +2e and a mass of 6.64 10-27 kg. It is accelerated from rest through a potential difference that has a value of1.20 106 V and then enters a uniform magnetic field whose magnitude is 2.20 T. The %u03B1-particle moves perpendicular to the magnetic field at all times.

(a) What is the speed of the %u03B1-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

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