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1. Electric Charges and Fields
normal
$2 \,cm$ વ્યાસવાળી તથા $1000\,cm$ દૂર રહેલી પ્લેટે આંખ સામે બનાવેલ ખૂણો .....
A
$0.2^°$
B
$0.002^°$
C
$0.0018^°$
D
$0.22^°$
Solution
ધન કોણ $\,\Omega \,\, = \, \frac{A}{{{r^2}}}\,\, = \,\frac{{\pi {R^2}}}{{{r^2}}}\,\, \Rightarrow \,\,\frac{{\pi \,\, \times \,\,{{(1)}^2}}}{{{{10}^6}}}\,\,\, \Rightarrow \,\,{0.0018^ \circ }$
Standard 12
Physics
