C Exercise 19.14 Part A A charged particle travels undeflected through perpendic

Question

C Exercise 19.14 Part A A charged particle travels undeflected through perpendicular electric and magnetic fields whose magnitudes are 6000 N/C and 30 mT, respectively Find the speed of the particle if it is a proton Express your answer using two significant figures m S Submit My Answers Give Up Part B Find the speed of the particle if it is an alpha particle. (An alpha particle is a helium nucleus-a positive ion with a double positive charge of +2e.) Express your answer using two significant figures m s Submit My Answers Give Up vid dback Continue

Explanation / Answer

A]Force by electric and magnetic field are in opposite direction,

qE=qvB

v = E/B = 6000/30e-3 = 2.0*10^5 m/s answer

B] Since v is independent of charge in the formula above,

v = 2.0*10^5 m/s answer

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