51. |
When an electron and a proton are both placed in an electric field _____ .
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Answer:
Option (b) |
52. |
The electric force acting between two point charges kept at a certain distance in vacuum is α. If the same two charges are kept at the same distance in a medium of dieelectric constant K. The electric force acting between them is ____.
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Answer:
Option (d) |
53. |
The distance between two point charges 4q and -q is r. A third charge Q is placed at their midpoint. The resultant force acting on -q is zero then Q = _____.
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Answer:
Option (a) |
54. |
The linear charge density on the circumference of a circle of radius 'a' varies as λ=λ0cosθ. The total charge on it is _____.
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Answer:
Option (a) |
55. |
Two identical metal spheres A and B carry same charge q. When the two spheres are at distance r from each other, the force acting between them is F. Another identical sphere C is first brought in contact with A, then it is touched to sphere B and then separated from it. Now the force acting between A and B at the same distance is _____
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Answer:
Option (c) |
56. |
Two point charges of q and 4q are kept 30 cm apart. At a distance _____, on the straight line joining them, the intensity of electric field is zero.
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Answer:
Option (a) |
57. |
The dimensions of permittivity [ε0] are _____ .Take Q as the dimension of charge.
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Answer:
Option (c) |
58. |
The electric dipole moment of an HCL atom is 3.4 × 10-30 Cm. The charges on both atoms are unlike and of same magnitude. Magnitude of this charge is _____ . The distance between the charges is 1 Å
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Answer:
Option (b) |
59. |
There exists an electric field of 100 N/C along Z-direction. The flux passing through a square of 10 cm sides placed on XY plane inside the electric field is _____.
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Answer:
Option (a) |
60. |
The radius of a conducting spherical shell is 10 mm and a 100 μC charge is spread on it. The force acting on a 10 μC charged placed at its centre is _____. k = 9×109 MKS.
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Answer:
Option (c) |