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F=BIL Or is it….. F=qvB Also Determine the direction of the Force!

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V B Positive Charge is moving

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Use: F=qvB Force is going:

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V B Negative Charge is moving

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Use: F=qvB Force is going: Coming out of the page!

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B I

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Use: F=BiL Force is going:

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F = 1.5x10-12 N V = 2.0x107 m/s Electron B = ?

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Use: F=qvB 1.5 x 10-12= (1.6 x 10-19C) x (2.0x107 m/s) x B B= T Force is going:

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B = .15 T Electron V = 1.5x106 m/s F = ?

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**You would break your hand trying this one so the charge will not feel any force**

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**B = .75 T What is the acceleration of the proton?**

Mass of a proton is = × kilograms B = .75 T Proton V = 5.8x106m/s

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Use: F=qvB F=ma ma=qvB ( × kg)x a = (1.6 x 10-19C) x (5.8x106m/s) x .75 T a = x 1014 m/s/s Force is going:

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**B = .75 T 1. What is the acceleration of the electron?**

2. What is the radius of curvature? Hint: ac = v2/r Electron V = 4.5x107m/s

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Use: F=qvB F=mv2/r mv2/r=qvB (9.11 × kg)(4.5x107m/s)2/r= (1.6 x 10-19C) x (4.5x107m/s) x .75 T r = 3.4 x 10-4 m Force is going:

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