Mastering Physics Homework 3: Problem 15 Part A:An old fashioned computer monito

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Mastering Physics Homework 3: Problem 15

Part A:An old fashioned computer monitor accelerates electrons and directs them to the screen in order to create an image. If the accelerating plates are 0.960 cm apart, and have a potential difference of 2.35×104 V , what is the magnitude of the uniform electric field between them?

Part B: A parallel-plate capacitor is made from two aluminum-foil sheets, each 4.8 cm wide and 6.3 m long. Between the sheets is a Teflon strip of the same width and length that is 3.4×102 mm thick...

What is the capacitance of this capacitor? (The dielectric constant of Teflon is 2.1.)

Express your answer using two significant figures.

Explanation / Answer

a) E= V/d= 2.35*10^4/(0.96*.01)= 2.45*10^6 V/m

b) c= k € A/d= 2.1*8.85*10-12*(0.048*6.3)/(3.4*10^-5)= 1.65*10-7 F

plz rate

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