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1. Electric Charges and Fields
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In a certain region of space, there exists a uniform electric field of value $2\times10^2\hat k\, Vm^{-1}$. A rectangular coil of dimension $10\, cm\times20\, cm$ is placed in the $xy$ plane. The electric flux through the coil is......$Vm$
A
$0$
B
$30$
C
$40$
D
$50$
Solution
$\overrightarrow{\mathrm{E}}=2000 \hat{\mathrm{k}}, \quad \overrightarrow{\mathrm{A}}=10 \times 20 \times 10^{-4} \hat{\mathrm{k}}=2 \times 10^{-2} \hat{\mathrm{k}}$
$\phi=\overrightarrow{\mathrm{E}} \cdot \overrightarrow{\mathrm{A}}=2 \times 10^{3} \times 2 \times 10^{-2}: 40 \mathrm{\,Vm}$
Standard 12
Physics
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