a and b Apply A Poter × e The Circuit Shown \'Bb Microsoft Word-TX × You X wi .

Question

a and b

Apply A Poter × e The Circuit Shown 'Bb Microsoft Word-TX × You X wi . 7325-dt-content-rid-34658075-1/courses/XLSPHYS 102LABcvk-201725/Lab%204%20PHY LAB-03 Motion of Charges in E and B Fields Sec./Group Date: Name: 4. Pre-Lab Consider an electron being ejected from the surface of a heated filament at nearly zero speed. [al Through what potential difference must it be accelerated to achieve a speed of 8.4x10°m/s? Any relativistic effects can be neglected. Ib] What is the minimum B-field required to cause the electron in part (al above to move in a circular orbit of radius r= 50 cm?

Explanation / Answer

Here ,

let the potential difference is V

0.50 * 9.11 * 10^-31 * (8.4 *10^6)^2 = V * 1.602 *10^-19

solving for V

V = 201 V

the potential difference is 201 V

b)

Now, for the rmagnetic field

r = m * u/(B * q)

0.05 = 9.11 *10^-31 * 8.4 *10^6/(B*1.602 *10^-19 )

B = 9.6 *10^-4 T

the magnetic field is 9.6 *10^-4 T

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