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Define electric field intensity at a poi...

Define electric field intensity at a point.

Text Solution

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Electric field intensity at a point is the force experienced by unit positive charge held at that point. Its direction is along which the unit positive charge would move. If free to do so.
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A thin long conductor has linear charge density of 20 muC//m . Calculate the electric field intensity at a point 5 cm from it. Draw a graph to show variation of electric field intensity with distance from the conductor.

Knowledge Check

  • If q is the charge per unit area on the surface of a conductor, then the electric field intensity at a point on the surface is

    A
    `((q)/(epsilon_(0)))` normal to surface
    B
    `((q)/(2epsilon_(0)))` normal to surface
    C
    `((q)/(epsilon_(0)))` tangential to surface
    D
    `((q)/(2epsilon_(0)))` tangential to surface
  • When electric field intensity at any point in the electric field is directed towards or away from the same fixed point, then the field is

    A
    circular electric field
    B
    uniform electric field.
    C
    radial electric field.
    D
    tangential electric field.
  • The magnitude of electric field intensity at a point on the axis of short dipole is 30V/m. The distance of the point from the centre of the dipole is 2m. Then potential at that point is

    A
    30V
    B
    25V
    C
    20V
    D
    15V
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    Derive an expression for the electric field intensity at a point outside a charged conducting sphere.

    What is the ratio of electric field intensity at a point on the equatorial line to the field at a point on axial line when the points are at the same distance from the centre of the dipole ?