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1. Electric Charges and Fields
easy
વિદ્યુતભાર $Q$ અને $-3Q$ અમુક અંતરે મૂકેલા છે,$Q$ પર વિદ્યુતક્ષેત્ર $E$ હોય,તો $-3Q$ પર વિદ્યુતક્ષેત્ર કેટલું થાય?
A
$ - E$
B
$-E/3$
C
$ - 3E$
D
$E/3$
Solution
(b) The field produced by charge $-3Q$ at $A$, this is $E$ as mentioned in the Example.
$\therefore $ $E = \frac{{3Q}}{{{x^2}}}$ (along $AB$ directed towards negative charge)
Now field at location of $-3Q$ i.e. field at $B$ due to charge $Q$ will be $E' = \frac{Q}{{{x^2}}} = \frac{E}{3}$ (along $AB$ directed away from positive charge)
Standard 12
Physics
