1:   The two matellic plates having charges +Q and -Q respectively are situated at some distance apart. If these plates are immersed into a tank of kerosene oil, then the intensity of electric field between them
Options:
1. will be zero
2. increases
3. decreases
4. remain same

Explanation:

Sorry, No description available.

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2:   The unit of permittivity of free space is
Options:
1. Coulomb / Newton meter
2. Newton meter ^2 / Coulomb ^2
3. Coulomb ^2 / Newton meter ^2
4. none of these

Explanation:

Sorry, No description available.

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3:   An electric dipole having charge q and dipole moment p is kept in an uniform electric field. If its dipole moment is along the direction of field, then the force acting on it and its potential energy respectively will be
Options:
1. 2qE and minimum
2. qE and pE
3. zero and minimum
4. none of these

Explanation:

Sorry, No description available.

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4:   A dielectric medium of dielectric constant K is filled between the two charges kept at a certain distance apart, the maximum force acting between the charges is
Options:
1. decreased K times
2. increased K times
3. remains unchanged
4. none of these

Explanation:

Sorry, No description available.

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5:   An isolated hollow sphere is given charge +10uC. If the radius of sphere is 2m, then the electric field at the center of sphere will be
Options:
1. zero
2. 5 u cm^-2
3. 20 u cm^-2
4. 8 u cm^-2

Explanation:

Sorry, No description available.

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6:   A particle of mass m and charge q is at rest in the electric field E. If the particle is released. then the K E acquired by it in travelling the distance y will be
Options:
1. qEy^2
2. qE^2y
3. qEy
4. q^2Ey

Explanation:

Sorry, No description available.

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7:   A point Q is situated on the perpendicular bisector of a dipole of dipole moment p. If the distance r if point Q is much greater than size of dipole, then the electric field at Q will be proportional to the
Options:
1. p^-1 and r^-2
2. p and r^-2
3. p^2 and r^-3
4. p and r^-3

Explanation:

Sorry, No description available.

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8:   An equiconvex lens of glass of focal length 0.1 m is cut along a place perpendicular to principal axis into tow equal parts. The ratio of focal length of new lenses formed is
Options:
1. 1:1
2. 1:2
3. 2:1
4. 2:1/2

Explanation:

Sorry, No description available.

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9:   A symmetric double convex lens is cut in tow equal parts by a plane perpendicular to principle axis. If the power of the original lens is 4D, then the power of the cut lens will be
Options:
1. 4D
2. 2D
3. 3D
4. 5D

Explanation:

Sorry, No description available.

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10:   Focal length of convex lens of glass (u = 3/2) is 12 cm. If it is immersed in liquid of u = 5/4, then its focal length will be
Options:
1. 6 cm
2. 12 cm
3. 24 cm
4. 30 cm

Explanation:

Sorry, No description available.

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Welcome to fear, said Moist to himself. It's hope, turned inside out. You know it can't go wrong, you're sure it can't go wrong...But it might.
-Terry Pratchett Going Postal