Please show all steps for further problem solving. Go over concepts. The answer

Question

Please show all steps for further problem solving. Go over concepts. The answer is not as important as the process of how to obtain the answer. Thank you

10. The picture tube of an old style TV set consists of an electron gun and a screen. The electrons from the gun are accelerated through a potential difference of 30.0kV before striking the screen. (a) Which is at a higher electric potential, the gun or the screen? (b) What is the kinetic energy of an electron (in eV and in J) as it reaches the screen?

Explanation / Answer

(a). Gun is at higher potential (b.potential diference V = 30 kV = 30000 V the kinetic energy of an electron (in eV and in J) as it reaches the screen K.E = Vq where q = charge of electron = 1.6 * 10^-19 C plug the values we get K.E = 4.8 * 10^-15 J = ( 4.8*10^-15 ) / (1.6*10^-19 ) eV = 30000 eV

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