Verified Solution • 2025–26 Session moderate

QAIPMT-2010-Ph-2068: NEET 2010 Physics - Class 11 AIPMT-2010-Ph-2068 Solution: A square surface of side L meter in the plane of the paper is…

A square surface of side L meter in the plane of the paper is placed in a uniform electric field E(volt/m) acting along the same plane at an angle θ\theta with the horizontal side of the square as shown in figure. The electric flux linked to the surface in units of volt.m is EL2EL^2 EL2cos⁡θEL^2\cos\theta EL2sin⁡θEL^2\sin\theta zero

Multiple Choice Options

  • A r2σ(t+273)44πR2{{{r^2}\sigma {{\left( {t + 273} \right)}^4}} \over {4\pi {R^2}}} 4 � R 2 r 2 _ ( t + 273 ) 4 _
  • B 16π2r2σt4R2{{16{\pi ^2}{r^2}\sigma {t^4}} \over {{R^2}}} R 2 16 � 2 r 2 _ t 4 _
  • C r2σ(t+273)4R2{{{r^2}\sigma {{\left( {t + 273} \right)}^4}} \over {{R^2}}} R 2 r 2 _ ( t + 273 ) 4 _
  • D 4πr2σt4R2{{4\pi {r^2}\sigma {t^4}} \over {{R^2}}} R 2 4 � r 2 _ t 4 _

Step-by-Step Verified Solution

Power radiated by the sun at t�C = _ ( t + 273 ) 4 4 � r 2 Power received by a unit surface = _ ( t + 273 ) 4 4 � r 2 4 � R 2 = r 2 _ ( t + 273 ) 4 R 2

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