JEE Questions for Physics Electrostatics Ii Quiz 5 - MCQExams.com

Two identical balls having like charges and placed at a certain distance apart repel each other with a certain force. They are brought in contact and then moved apart to a distance equal to half their initial separation. The force of repulsion between them increases 4.5 times in comparison with the initial value. The ratio of the initial charges of the balls is........
  • 4 : 1
  • 6 : 1
  • 3 : 1
  • 2 : 1
A point charge q is situated at a distance r from one end of a thin conducting rod of length L having a charge Q (uniformly distributed along its length). The magnitude of electric force between the two, is ...............

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  • 2)
    Physics-Electrostatics II-73285.png

  • Physics-Electrostatics II-73286.png

  • Physics-Electrostatics II-73287.png
Two point charges of +16c and –9c are placed 8 cm apart in air. ............... distance of a point from –9c charge at which the resultant electric field is zero.
  • 24 cm
  • 9 cm
  • 16 cm
  • 35 cm

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  • Physics-Electrostatics II-73291.png
  • 2)
    Physics-Electrostatics II-73292.png

  • Physics-Electrostatics II-73293.png

  • Physics-Electrostatics II-73294.png
An inclined plane making an angle of 30o with the horizontal is placed in an uniform electric field E = 100 Vm–1 A particle of mass 1 kg and charge 0.01 c is allowed to slide down from rest from a height of 1m. If the coefficient of friction is 0.2 the time taken by the particle to reach the bottom is .......... sec.
  • 2.337
  • 4.337
  • 5
  • 1.337

Physics-Electrostatics II-73297.png
  • 41.8o
  • 45o
  • 40.8o
  • 45.8o
A Semicircular rod is charged uniformly with a total charge Q coulomb. The electric field intensity at the centre of curvature is .......

  • Physics-Electrostatics II-73299.png
  • 2)
    Physics-Electrostatics II-73300.png

  • Physics-Electrostatics II-73301.png

  • Physics-Electrostatics II-73302.png
The electron is projected from a distance d and with initial velocity νo parallel to a uniformly charged flat conducting plate as shown in figure. It strikes the plate after travelling a distance l along the direction. The surface charge density of conducting plate is equal to
Physics-Electrostatics II-73304.png

  • Physics-Electrostatics II-73305.png
  • 2)
    Physics-Electrostatics II-73306.png

  • Physics-Electrostatics II-73307.png

  • Physics-Electrostatics II-73308.png
Two point masses m each carrying charge –q and +q are attached to the ends of a massless rigid non-conducting rod of length l. The arrangement is placed in a uniform electric field E such that the rod makes a small angle 5o with the field direction. The minimum time needed by the rod to align itself along the field is ........

  • Physics-Electrostatics II-73310.png
  • 2)
    Physics-Electrostatics II-73311.png

  • Physics-Electrostatics II-73312.png

  • Physics-Electrostatics II-73313.png
Two uniformely charged spherical conductors A and B having radius 1mm and 2mm are separated by a distance of 5 cm. If the spheres are connected by a conducting wire then in equilibrium condition, the ratio of the magnitude of the electric fields at the surfaces of spheres A and B is .........
  • 4 : 1
  • 1 : 2
  • 2 : 1
  • 1 : 4

Physics-Electrostatics II-73316.png

  • Physics-Electrostatics II-73317.png
  • 2)
    Physics-Electrostatics II-73318.png

  • Physics-Electrostatics II-73319.png
  • 0
Two point charges q1 = 2 c and q2 = 1 c are placed at distance b = 1cm and a = 2 cm from the origin on the y and x axes as shown in figure. The electric field vector at point P (a, b) will subtend an angle θ with the X – axis given by,

  • Physics-Electrostatics II-73321.png
  • 2)
    Physics-Electrostatics II-73322.png

  • Physics-Electrostatics II-73323.png

  • Physics-Electrostatics II-73324.png
A simple pendulum consists of a small sphere of mass m suspended by a thread of length l. The sphere carries a positive charge q. The pendulum is placed in a uniform electric field of strength E directed Vertically upwards. If the electrostatic force acting on the sphere is less than gravitational force the period of pendulum is

  • Physics-Electrostatics II-73326.png
  • 2)
    Physics-Electrostatics II-73327.png

  • Physics-Electrostatics II-73328.png

  • Physics-Electrostatics II-73329.png

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  • Physics-Electrostatics II-73332.png
  • 2)
    Physics-Electrostatics II-73333.png

  • Physics-Electrostatics II-73334.png
  • 0
In Millikan’s oil drop experiment an oil drop carrying a charge Q is held stationary by a p.d. 2400 v between the plates. To keep a drop of half the radius stationary the potential difference had to be made 600 v. What is the charge on the second drop ?

  • Physics-Electrostatics II-73336.png
  • 2)
    Physics-Electrostatics II-73337.png

  • Physics-Electrostatics II-73338.png

  • Physics-Electrostatics II-73339.png
Equal charges q are placed at the vertices A and B of an equilateral triangle ABC of side a. The magnitude of electric field at the point c is .........

  • Physics-Electrostatics II-73341.png
  • 2)
    Physics-Electrostatics II-73342.png

  • Physics-Electrostatics II-73343.png

  • Physics-Electrostatics II-73344.png

Physics-Electrostatics II-73346.png

  • Physics-Electrostatics II-73347.png
  • 2)
    Physics-Electrostatics II-73348.png

  • Physics-Electrostatics II-73349.png

  • Physics-Electrostatics II-73350.png

Physics-Electrostatics II-73358.png
  • 100 m
  • 50 m
  • 200 m
  • 0 m
If electron in ground state of H-atom is assumed in rest then dipole moment of electron proton system of H-atom is ............... . Orbit radius of H atom in ground state is 0.56 Å

  • Physics-Electrostatics II-73360.png
  • 2)
    Physics-Electrostatics II-73361.png

  • Physics-Electrostatics II-73362.png

  • Physics-Electrostatics II-73363.png
At what angle θ a point P must be located from dipole axis so that the electric field intensity at the point is perpendicular to the dipole axis ?

  • Physics-Electrostatics II-73365.png
  • 2)
    Physics-Electrostatics II-73366.png

  • Physics-Electrostatics II-73367.png

  • Physics-Electrostatics II-73368.png

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  • Physics-Electrostatics II-73371.png
  • 2)
    Physics-Electrostatics II-73372.png

  • Physics-Electrostatics II-73373.png

  • Physics-Electrostatics II-73374.png

Physics-Electrostatics II-73376.png
  • 1
  • 2
  • 3
  • 4

Physics-Electrostatics II-73377.png

  • Physics-Electrostatics II-73378.png
  • 2)
    Physics-Electrostatics II-73379.png

  • Physics-Electrostatics II-73380.png

  • Physics-Electrostatics II-73381.png
A Charge q is placed at the centre of the open end of cylindrical vessel. The flux of the electric field through the surface of the vessel is ...........

  • Physics-Electrostatics II-73383.png
  • 2)
    Physics-Electrostatics II-73384.png

  • Physics-Electrostatics II-73385.png
  • Zero

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  • Physics-Electrostatics II-73387.png
  • 2)
    Physics-Electrostatics II-73388.png

  • Physics-Electrostatics II-73389.png

  • Physics-Electrostatics II-73390.png
A sphere of radius R has a uniform distribution of electric charge in its volume. At a distance x from its centre, (for x < R), the electric field is directly proportional to ..........

  • Physics-Electrostatics II-73392.png
  • 2)
    Physics-Electrostatics II-73393.png

  • Physics-Electrostatics II-73394.png

  • Physics-Electrostatics II-73395.png

Physics-Electrostatics II-73397.png

  • Physics-Electrostatics II-73398.png
  • 2)
    Physics-Electrostatics II-73399.png

  • Physics-Electrostatics II-73400.png

  • Physics-Electrostatics II-73401.png
A hollow cylinder has a charge q coulomb within it. If ϕ is the electric flux in units of voltmeter associated with the curved surface B, the flux linked with the plane surface A in units of volt-meter will be .............
Physics-Electrostatics II-73403.png

  • Physics-Electrostatics II-73404.png
  • 2)
    Physics-Electrostatics II-73405.png

  • Physics-Electrostatics II-73406.png

  • Physics-Electrostatics II-73407.png

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  • Physics-Electrostatics II-73410.png
  • 2)
    Physics-Electrostatics II-73411.png

  • Physics-Electrostatics II-73412.png

  • Physics-Electrostatics II-73413.png
Two points are at distances a and b (a < b) from a long string of charge per unit length λ. The potential difference between the points in proportional to .............

  • Physics-Electrostatics II-73415.png
  • 2)
    Physics-Electrostatics II-73416.png

  • Physics-Electrostatics II-73417.png

  • Physics-Electrostatics II-73418.png
0:0:1


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