A hollow metal sphere of radius 20 cm is charged such that the potential on its surface is 120 Volt. The potential at the centre of the sphere is
  • 80 V
  • 6 V
  • 120 V
  • Zero
The work done in moving a positive test charge qo from infinity to a point P at a distance r from the charge q is
Electrostatic-Potential-Multiple-Choice-Questions-for-CBSE-Class-12-Physics-Topperlearning.png
  • A
  • B
  • C
  • D
Electric field intensity is equal to
  • time rate of change of potential
  • minimum rate of change of potential with distance
  • maximum rate of change of potential with distance
  • none of the above
Electric potential at a point located far away from the charge is taken to be
  • Unity
  • May be zero or infinite
  • Zero
  • Infinite
A charge of 6 mC is located at the origin. The work done in taking a small charge of -2 x 10-9 C from a point P (0, 3 cm, 0) to a Q (0,4 cm, 0) is
  • 0.5 J
  • 1.12 J
  • 1.2 J
  • 0.9 J
A hollow metal sphere of radius 5 cm is charged such that the potential on its surface is 10 V. The potential at the centre of the sphere is
  • 0 V
  • 10 V
  • same as at point 25 cm away from the surface
  • same as at point 5 cm away from the surface
It requires 4 J of work to move a charge of 20 C from point A to point B, separated by a distance of 0.2 cm. The potential difference between A and B in volts
  • 0.2
  • 16
  • 5
  • 80
What is the direction of the lines of force at any point on the equipotential surface?
  • Parallel to it
  • Perpendicular to it.
  • Inclined at 45 degrees
  • None of the above
A hollow metal sphere of radius 10 cm is charged such that the potential on its surface is 80 volt. The potential at the centre of the sphere is
  • 8 volt
  • zero
  • 800 volt
  • 80 volt
Electric field intensity at point ‘B’ due to a point charge ‘Q’ kept at a point ‘A’ is 12 NC-1 and the electric potential at a point ‘B’ due to same charge is 6 JC-The distance between AB is
  • 2 m
  • 1.5 m
  • 1 m
  • 0.5 m
E=-dV/dr, here the negative sign signifies that
  • E increases when V decreases
  • E is directed in the direction of decreasing V
  • E is negative
  • E is opposite to V
Work done in carrying 2C charge in a circular path of radius 2m around a charge of 10C is
  • 6.67J
  • 60J
  • Zero
  • 15J
Dimensional formula for potential difference is
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  • A
  • B
  • C
  • D
Whats motion?
  • Motion
  • Speed
  • Force
  • None
If 100 J of work has to be done in moving an electric charge of 4C from a place where potential is -5 V to another place, where potential is V volt. The value of V is
  • 15 V
  • 20 V
  • 25 V
  • 10 V
A particle of charge q1 = is located on x-axis at the point x1 = 6 cm. A second point charge q2 =  is placed on the x-axis at x2 = -4 cm. The absolute electric potential at the origin is
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7234_image017.gif
  • 9 x 10-6 V
  • 9 x 105 V
  • 9 x 10-4 V
  • 9 x 10-2 V
Electric potential is
  • scalar and dimensionless
  • vector and dimensionless
  • scalar with dimension
  • vector with dimension
The amount of work done in moving a unit positive charge through distance of 10 cm on an equipotential surface is
  • 100 joule
  • 10 cm
  • 1/10 cm
  • Zero
Equal charges are given to two spheres of different radii. The potential will
  • be equal on both the spheres
  • be more on the smaller sphere
  • be more on the bigger sphere
  • depend on the material of the sphere
A hollow metal sphere of radius 5cm is charged so that the potential on its surface is 10V. The potential at a distance of 2cm from the centre of the sphere is
  • 4V
  • zero
  • 10/3V
  • 10V
0 h : 0 m : 1 s

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