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Two point charges +3 and 8repel each other with a force of40N.if a charge of_5 is added to each what will be the gorce between them |
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Answer» REDISTRIBUTION of charges takes place. Charge Q 1
=3μC Charge q 2
=8μC When third charge q 3
=−5μC is added to each, then new charges on q 1
and q 2
will be q 1 ′
=3−5=−2μC and, q 2 ′
=8−5=3μC Now, In first case, 40= 4πε
1
⋅ r 2
3×8
In second case, F= 4πε 0
1
× r 2
(−2×3)
∴ 40 F
= 3×8 −2×3
or F=−10N |
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