A uniform electric field E = 2 × 103 N C-1 is acting along the positive x-axis, the flux through the same square if the line normal to its plane makes a 60° angle with the x-axis is

Question

A uniform electric field E = 2 × 103 N C-1 is acting along the positive x-axis, the flux through the same square if the line normal to its plane makes a 60° angle with the x-axis is (A) 30 N C-1 m2 (B) 10 N C-1 m2 (C) 20 N C-1 m2 (D) 25 N C-1 m2

Tardigrade Admin · Accepted Answer

When normal to the plane makes an angle of 60° with x-axis, then θ = 60° φ=Es cosθ=2×103×10-2 cos 60°=10 N C-1 m2

Q. A uniform electric field $E = 2 \times 1 0^{3} N C^{- 1}$ is acting along the positive $x$ -axis, the flux through the same square if the line normal to its plane makes a $6 0^{°}$ angle with the $x$ -axis is

$30 N C^{- 1} m^{2}$

$10 N C^{- 1} m^{2}$

$20 N C^{- 1} m^{2}$

$25 N C^{- 1} m^{2}$

When normal to the plane makes an angle of $6 0^{°}$ with $x$ -axis, then $θ = 6 0^{°}$
$ϕ = E s cos θ = 2 \times 1 0^{3} \times 1 0^{- 2} cos 6 0^{°} = 10 N C^{- 1} m^{2}$

Q. A uniform electric field E=2×103NC−1 is acting along the positive x-axis, the flux through the same square if the line normal to its plane makes a 60° angle with the x-axis is

30NC−1m2

10NC−1m2

20NC−1m2

25NC−1m2