PART 2
Q1 Electric field at the center of charged circular loop is
- ∞
- 0
- Always 0
- None of these
Q2 Direction of electric field on the axis of a charged ring is along
- ⊥ to the axis
- along the axis
- `45^{0}` with axis
- the centre
Q3 .The net force acting on a dipole in a uniform electric field is
- In the direction of electric field
- Opposite to the direction of electric field
- Always zero
- In a direction ⊥ to electric field
Q4 The potential energy of a dipole is zero if angle made by the dipole moment with electric field is
- `45^{0}`
- `90^{0}`
- `180^{0}`
- `0^{0}`
Q5 The dipole is said to be in stable equilibrium when the dipole moment is
- In the direction of the field
- Opposite to the direction of the field
- ⊥ to the direction of the field
- At `45^{0}` with the direction of the field
Q6 The dipole is said to be in unstable equilibrium when the dipole moment is
- In the direction of the field
- Opposite to the direction of the field
- ⊥ to the direction of the field
- At`45^{0}` with the direction of the field
Q7 If a dipole is placed in a non uniform electric field then it will experience ?
Q8 Torque has the units of
- Nm
- Cm
- `Nm^{2}`
- `Cm^{-1}`
Q9 A system of two equal and opposite charges separated by a certain distance is called
- Electric field
- Electric dipole
- Electric dipole moment
- Electric flux
Q10 Dipole length is a ...
- Scalar quantity
- Vector quantity
PART 4
Q1 Force acting on a stationary point charge q in an electric field E is
- `q^{2}E`
- `\frac{q}{E}`
- qE
- `\frac{E}{q}`
Q2 Electric field intensity due to a source charge at a distance r varies as
- r
- `r^{2}`
- `r^{-2}`
- `r^{-1}`
Q3 Dimensional formula of electric field is
- `MLT^{-3}A^{-1}`
- `MLT^{-2}A^{-1}`
- `ML^{2}T^{-2}A^{-1}`
- `MLT^{2}A^{-1}`
Q4 The electric field E at a point just outside a perfect conductor is
- parallel to surface
- zero
- perpendicular to surface
- any direction
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
Q6 which of the following is deflected by a electric field
- neutrons
- alpha particles
- gamma rays
- all of these
Q7 An electron and a proton are in a uniform electric field. The ratio of their accelerations will be
- Zero
- unity
- `\frac{m_p}{m_e}`
- `\frac{m_e}{m_p}`
Q8 an electron enters in the electric field with its velocity in direction of electric field then
- path of electrons will be circle
- path of electrons will be parabola
- velocity of electrons will decrease
- velocity of electrons will increase
Q9 an electron having charge e and mass m moving in a uniform electric field E. Its acceleration will be
- `\frac{e^2}{m}`
- `\frac{E^2}{m}e`
- `\frac{eE}{m}`
- `\frac{mE}{e}`
`
ELECTRIC FLUX
Q1 Units of Electric flux are
- `NC^{-1}m^{2}`
- `NC^{-2}m^{-1}`
- `N^{-1}C^{-1}m^{2}`
- `NC^{2}m^{2}`
Q2 Electric Flux through a closed surface according to Gauss’ law is
- `\frac{╬╡_{0}}{q}`
- `\frac{q}{╬╡_{0}}`
- `q{╬╡_{0}}`
- None of these
Q3 Electric Flux is minimum when the angle between the electric field lines and the area vector of the surface is
- `0^{0}`
- `90^{0}`
- `60^{0}`
- `45^{0}`
Q4 The electric field due to infinite plane sheet of charge density ╧Г is:
- 0
- ╧Г
- `\frac{╧Г}{╬╡_{0}}`
- `\frac{╧Г}{2╬╡_{0}}`
Q5 The electric flux due to a line charge falls off with distance as
- `\frac{1}{r}`
- `\frac{1}{r^{2}}`
- r
- None of these
Q6 Units of Electric flux are
- `NC^{-1}m^{2}`
- `NC^{-2}m^{-1}`
- `N^{-1}C^{-1}m^{2}`
- `NC^{2}m^{2}`
Q7 Electric field inside charged spherical shell is zero
- True
- False
Q8 Area Vector is a
- Scalar quantity
- Vector quantity
Q9 Electric flux is a scalar quantity
- True
- False
Q10 The area vector of a surface lying in the x-y plane on the coordinate axes, points along the z direction
- True
- False
