1) A flat piece of cardboard with area 77.0 cm 2 is immersed in a uniform electr
ID: 1632148 • Letter: 1
Question
1) A flat piece of cardboard with area 77.0 cm2 is immersed in a uniform electric field of strength 8.30×103 N/C. If the angle between the field and the cardboard’s area vector is 121°, find the electric flux through the cardboard. please give me the answer in (N/C)·m2
1) A flat piece of cardboard with area 77.0 cm2 is immersed in a uniform electric field of strength 8.30×103 N/C. If the angle between the field and the cardboard’s area vector is 121°, find the electric flux through the cardboard. please give me the answer in (N/C)·m2
2) A cherry with charge 0.00000310 C is embedded in an uncharged cube of jello. Find the flux going through the walls of the jello. Please give me the answer in (N/C)·m2Explanation / Answer
1) Electric flux = E.A
= E A cos(theta)
= (8.30 x 10^3) (77 x10^-4) cos121
= - 32.92 N m^2 / C
2) from Gauss law,
total flux through surface = Qin / e0
= (0.00000310) / (8.854 x 10^-12)
= 3.50 x 10^5 N m^2 / C
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