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1. Electric Charges and Fields
easy
આપેલ આકૃતિમાં $'O'$ એ $AB$ નું મધ્યબિંદુ હોય તો $Q$ વિદ્યુતભાર પરનું બળ ગણો.
A
$\frac{{8k{Q^2}{q^2}}}{{{r^2}}}$
B
$\frac{{7kQq}}{{{r^3}}}$
C
$\frac{{8kQq}}{{{r^2}}}$
D
$\frac{{8kQq}}{r}$
Solution
${F_{net}}\,\, = \,\,{F_A}\, + \,\,{F_B}\, = \,\,2F\,({F_A}\, = \,\,{F_B}\, = \,\,F)\,\, \Rightarrow \,\,{F_{net}}\, = \,\,\frac{{2kQq}}{{{{(r/2)}^2}}}\,\,\, = \,\,\frac{{8kQq}}{{{r^2}}}$
Standard 12
Physics
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