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Two point charges of +5.00 μC and +8.00 μC are placed inside a cube of edge length...
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Valedictorian, Super Tutor, Tutor
There are two cases:
1) charges are well within.
2) charges are at corners.
for case 1)
Total Flux = (total charge)/(epsilon not)
= [(5+8)*10^(-5)]/[8.85 * 10^(12)]
=1.47 * 10^6 Nm^2/C
answer is (B)
for case 2)
If the charges are at corners then actually each cherge is shared by virtually 8 cubes, so you must divide the result by 8, so
Total Flux =(1/8) * 1.47 * 10^6 Nm^2/C
= 1.83 * 10^6 Nm^2/C
as this result doesn't match any option so I think the charged are inside the cube in your problem.
So the case (1) is the actual case and the anser is (B)
Posted by quantatanu on September 26, 2012 at 2:25 PM (Answer #1)
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