1) A point charge with a charge q1 = 3.70?C is held stationary at the origin. A
ID: 2132068 • Letter: 1
Question
1) A point charge with a charge q1 = 3.70?C is held stationary at the origin. A second point charge with a charge q2 = -4.70?C moves from the pointx= 0.170m , y=0 to the pointx= 0.270m , y= 0.280m . How much work is done by the electric force on q2?+++++++++++++++++++++++++++
A square insulating sheet 77.0 cm on a side is held horizontally. The sheet has 7.65nC of charge spread uniformly over its area.
a) Calculate the electric field at a point 0.490 mm above the center of the sheet. ans : E = 7.56?102 N/C
b ) Estimate the electric field at a point located a distance 180 m above the center of the sheet.
for this problem i just need B or just explane to me how to find CHARGE DENSITY, i would really appreciate it 1) A point charge with a charge q1 = 3.70?C is held stationary at the origin. A second point charge with a charge q2 = -4.70?C moves from the pointx= 0.170m , y=0 to the pointx= 0.270m , y= 0.280m . How much work is done by the electric force on q2?
+++++++++++++++++++++++++++
A square insulating sheet 77.0 cm on a side is held horizontally. The sheet has 7.65nC of charge spread uniformly over its area.
a) Calculate the electric field at a point 0.490 mm above the center of the sheet. ans : E = 7.56?102 N/C
b ) Estimate the electric field at a point located a distance 180 m above the center of the sheet.
for this problem i just need B or just explane to me how to find CHARGE DENSITY, i would really appreciate it
Explanation / Answer
2)a) the electric field of sheet= chargedensity/2*8.825*10^-12 =(7.65nC/77^2*10^-4)/2*8.825*10^-12 =756.102N/C b) electric field for sheet charge is independent of height hence at a distance 180 m E=756.102N/C
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