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Standard XII
Physics
Introducing Flux
Question

A particle that carries a charge −q is placed at rest in uniform electric field 10 N/C. It experiences a force and moves in a certain time t, it is observed to acquire a velocity 10→i−10→j m/s. The given electric field intersects a surface of area A m2in the X -Z plane. Electric flux through surface is:


  1. 5√2A Nm2/C
  2. √2A Nm2/C
  3. 5A Nm2/C
  4. 2√5A Nm2/C

A
√2A Nm2/C
B
5√2A Nm2/C
C
2√5A Nm2/C
D
5A Nm2/C
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Solution
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v=10^i−10^j

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Similar Questions
Q1

A particle that carries a charge −q is placed at rest in uniform electric field 10 N/C. It experiences a force and moves in a certain time t, it is observed to acquire a velocity 10→i−10→j m/s. The given electric field intersects a surface of area A m2in the X -Z plane. Electric flux through surface is:


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Q2
The inward and outward electric flux for a closed surface in Nm2/C are respectively 8×103 and 4×103. Then the total charge inside the surface is C.
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Q3
An electric field →E=4x ^i−(y2+1) ^j N/C passes through the box shown in figure. The flux of the electric field through surface ABCD and BCGF are marked as ϕ1 and ϕ11 respectively. The difference between (ϕ1−ϕ11) is (in NM2/C)


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Q4
The electric field in a region is given by →E=E0xl^i. Find the charge contained inside a cubical volume bounded by the surfaces x=0, x=a, y=0, y=a, z=0 and z=a.
Take
E0=5×103 N/C, l=2 cm,
a=1 cm,ε0=8.86×10−12 C2/Nm2
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Q5
A plane surface of area 10 cm2 is placed in a uniform electric field of 20 N/C such that the angle between the surface and the electric field is 30o. The electric flux over the surface is:
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