Q1 an electric dipole of moment p is lying along a uniform electric field E. The work done in rotating the dipole by `90^{0}` is E is

- pE
- 3pE
- 2pE
- `\frac{E}{p}`

**pE **

Q2 The electric field intensity due to electric dipole at a point of distance r from its centre varies as: varies as

- r
- `r^{2}`
- `r^{-2}`
- `r^{-3}`

**`r^{-3}`Electric field intensity due to an electric dipole varies inversely as cube of the distance of the point.**

Q3 S.I. unit of electric dipole moment is

- Am
- `Am^{-1}`
- Cm
- `Cm^{-1}`

** Cm **

Q4 a stationary charge produces:

- an electric field only
- an magnetic field only
- both electric and magnetic field
- None of these

**an electric field only **

Q5 The electric field inside a spherical shell of uniform surface charge density

- Zero
- constant less than zero
- directly proportional to distance from center
- None of these

**Zero **

Q6 force experienced by a dipole in uniform electric field is called

- linear force
- Nuclear force
- torque
- all of these

**Torque **

Q7 What is the angle between the electric dipole moment and the electric field strength due to it on the axial line

- Zero
- `90^{0}`
- `180^{0}`
- `60^{0}``

**Zero. The direction of electric field on axial line is same as that of dipole moment i.e. from negative to positive charge**

Q8 The electric field outside a spherical shell and solid sphere is

- Same
- different
- both a and b are possible
- None

**Same **

Q9 The electric field inside a solid sphere is

- Directly Proportional to `r^{2}`
- Inversely Proportional to `r^{2}`
- Inversely Proportional to r
- Directly Proportional to r

**Directly Proportional to r **

Q10 The electric field lines provide information about?

- Field strength
- direction of electric field
- nature of charge
- all of these

**all of these **

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