Tuesday, 20 September 2022

ELECTRIC DIPOLE AND ELECTRIC DIPOLE MOMENT PART 1


Q1 A system of two equal and opposite charges (+q and -q) separated by a small distance 'd', has a dipole moment 'p' equal to

  • `\frac{q}{d}`
  • `\frac{2q}{d}`
  • 2qd
  • None of these

  • 2qd


Q2 The direction of  electric dipole moment is

  • from +q and -q
  • from -q and +q
  • perpendicular to the line joining -q to +q
  • away from +q 

  • from -q and +q
  •  

    Q3 .The unit of Electric dipole moment is

    • Cm
    • `Cm^{-1}`
    • `Cm^{-2}`
    • `NCm^{-2}`

    • Cm


    Q4 When an electric dipole is placed in a uniform external electric field parallel to the field, it will experience

    • a torque but no force
    • a force but no torque
    • a torque as well as force
    • neither a force nor a torque

    • a torque but no force


    Q5 The direction of electric field due to an electric dipole at a point on its axial line is

    • Same as that of electric dipole moment
    • Zero
    • different to  that of electric dipole moment
    • None of the above

    • Same as that of electric dipole moment


    Q6 The direction of electric field due to an electric dipole at a point on its equatorial line is

    • Same as that of electric dipole moment
    • Zero
    • opposite to  that of electric dipole moment
    • None of the above

    • opposite to  that of electric dipole moment
     

    Q7 work done in moving a charge along equatorial line is ?

    • Maximum 
    • minimum
    • Zero
    • None of these 

    • Zero
    • Reason: The Electric Potential is every where zero on the equtorial line of a dipole.


    Q8 Dipole Moment Vector Quantity.

    • true
    • false 

    • true


    Q9 A system of two equal and opposite charges separated by a certain distance is called

    • Electric field 
    • Electric dipole
    • Electric dipole moment
    • Electric flux

    • Electric dipole


    Q10 Dipole length is a .

    • Scalar quantity 
    • Vector quantity

  • Vector quantity

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