1. Electric Charges and Fields
easy

$a$ બાજુવાળા ચોરસના કેન્દ્રની ઉપર $a/2$ અંતરે $q$ વિદ્યુતભાર મૂકતાં સમઘનની કોઇ એકબાજુમાંથી કેટલુ ફલ્‍કસ પસાર થાય?

A

$\frac{q}{{{\varepsilon _0}}}$

B

$\frac{q}{{\pi {\varepsilon _0}}}$

C

$\frac{q}{{4{\varepsilon _0}}}$

D

$\frac{q}{{6{\varepsilon _0}}}$

Solution

(d) An imaginary cube can be made by considering charge $q$ at the centre and given square is one of it's face.
So flux from given square (i.e. one face) $\varphi = \frac{q}{{6{\varepsilon _0}}}$

Standard 12
Physics

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