an electron in aTV CRT moves with a nt I Help Homew ork . Chapter 22 Begin Date:
ID: 2036144 • Letter: A
Question
an electron in aTV CRT moves with a nt I Help Homew ork . Chapter 22 Begin Date: ¡2/27/2017 12:00:00 AM .. Due Date: 4 4/20 18 11:59:00 PM End Date: 4/30/2018 i 2:00:00 AM (10%) Problem 4: An electron in a TVCRT moves with a speed of 0.25 x 107 m/s, in a direction perpendicular to the Earth's magnetic field, which has a strength of 3.75 x 10-T ?50% Part what electric field strength in kvrn must be applied perpendicular to the Earth's magnetic field to make the electron moves a Grade Summary Potential 100% 7 8 9 4 5 6 12 3 tan() |?|( cotan asin acos0 atan) acotansinh0 cosh0 tanhcotanhO Attempts remaining 10 (1% per attempt) detailed view 0 Submit Hint 1 give up Hints: 1 % deduction per hint Hints remaining 2 Feedback: 0% deduction per feedback. 50% Part (b) If this is done between plates separated by 0.85 cm, what is the voltage applied in V? (Note that TVs are usually surrounded by a ferromagnetic material to shield against external magnetic fields and avoid the need for such a correction.) All costest 2018 Expert TA LLCExplanation / Answer
a) E = B v
= 3.75 * 10-5 * 6.25 * 107
electric field = 2344 V/m = 2.34 kV/m
b) V = E d
= 2344 * 0.85 * 10-2
voltage applied = 19.92 volts
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