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Electric Charge...

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  • Question 1
    4 / -1

    The force per unit charge is known as

  • Question 2
    4 / -1

    Electrical as well as gravitational affects acan be thought to be caused by fields. Which the following is true of an electrical or gravitational field?

  • Question 3
    4 / -1

    The electric field at a point is

  • Question 4
    4 / -1

    The dimensional formula of electric intensity is

  • Question 5
    4 / -1

    If the charge on an object is doubled then electric field becomes

  • Question 6
    4 / -1

    A force of 2.25 N acts on a charge of 15 x 10-4 C. The intensity of electric field at that point is

  • Question 7
    4 / -1

    A conducting sphere of radius 10 cm has unknown charge. If the electric field at a distance 20 cm from the centre of the sphere is 1.2 x 103N C-1 and points radially inwards. The net charge on the sphere is

  • Question 8
    4 / -1

    A particle of mass 10-3kg and charge 5μC is thrown at a speed of 20m s-1 against a uniform electric field of strength 2 x 105 N C-1. The distance travelled by particle before coming to rest is

  • Question 9
    4 / -1

    An electron initially at rest falls a distance of 1.5 cm in a uniform electric field of magnitude 2 x 104N/C. The time taken by the electron to fall this distance is 

  • Question 10
    4 / -1

    The electric field that can balance a charged particle of mass 3.2 x 10-27 kg is (Given that the charge on the particle is 1.6 x 10-19 C)

  • Question 11
    4 / -1

    An oil drop of 10 excess electrons is held stationary under a constant electric field of 3.65 x 104 N C-1 in Millikan's oil drop experiment. The density of oil is 1.26 g cm-3. Radius of the oil drop is
    (Take, g = 9.8 m s-2, e = 1.6 x 10-19 C)

  • Question 12
    4 / -1

    Five equal charges each of value q are placed at the corners of a regular pentagon of side a. The electric field at the centre of the pentagon is
     

  • Question 13
    4 / -1

    Five equal charges each of value q are placed at the corners of a regular pentagon of side a. What will be the electric field at centre O, if the charge from one of the corners (say A) is removed?

  • Question 14
    4 / -1

    In question number 45, what will be the electric field at O if the charge q at A is replaced by -q?

  • Question 15
    4 / -1

    The tracks of three charged particles in a uniform electrostatic field as shown in the figure. Which particle has the highest charge to mass ratio?

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