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1. Electric Charges and Fields
easy
If the electric field is given by $(5 \hat{i}+4 \hat{j}+9 \hat{k})$. The electric flux through a surface of area $20$ units lying in the $Y-Z$ plane will be (in units)
A
$100$
B
$80$
C
$180$
D
$20$
(AIIMS-2019)
Solution
The electric flux is calculated as,
$\dot{I}=E \cdot d s$
$=(5 \hat{i}+4 \hat{j}+9 \hat{k}) \cdot 20 \hat{i}$
$=100$ units
Standard 12
Physics
