એક સમઘનને \(\overrightarrow{{E}}=150\, {y}^{2}\, \hat{{j}}\) જેટલા વિદ્યુતક્ષેત્રની અંદર મૂકવામાં આવે છે. સમઘનની બાજુની લંબાઈ \(0.5 \,{m}\) અને તેને આકૃતિમાં દર્શાવ્યા પ્રમાણે મૂકવામાં આવે છે. સમઘનની અંદરનો વિદ્યુતભાર \((\times 10^{-11} {C}\) માં) કેટલો હશે?

A \(3.8\)
B \(8.3\)
C \(0.38\)
D \(830\)

Verified Solution

Answer & Solution

Correct Answer

(B) \(8.3\)

Step-by-step Solution

Detailed explanation

As electric field is in \(y-\)direction so electric flux is only due to top and bottom surface Bottom surface \({y}=0\) \(\Rightarrow {E}=0 \Rightarrow \phi=0\) Top surface \({y}=0.5\, {m}\) \(\Rightarrow {E}=150(0.5)^{2}=\frac{150}{4}\) Now flux…

Apply the relevant identity from the chapter and substitute the values established in the previous step, keeping the original constraint in view.

Use the simplified expression to isolate the unknown, then plug the result back into the question setup to confirm the working is internally consistent.

Cross-check against a boundary or limiting case. Both the dimensional balance and the qualitative behaviour at the extreme should agree with the candidate answer.

Combine the steps above to identify the correct option. The remaining choices each fail at least one of the consistency, dimensional, or boundary checks.

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