MEDIUM
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Which one of the following statements is not true for electric field lines due to two positive charges situated at a distance in space?

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Important Questions on Electrostatics

EASY
A long cylindrical shell carries positive surface charge σ in the upper half and negative surface charge σ in the lower half. The electric field lines around the cylinder will look like figure given in:

(figures are schematic and not drawn to scale)
MEDIUM
The angle between the electric lines of force and the equipotential surface is
EASY
Which is the INCORRECT statement regarding electric lines of force
EASY
The number of electric field lines emerged out from 1 mC charge is ______. ε=8.85×10-12MKS
MEDIUM
Which statement(s) among the following are incorrect:
(i) A negative test charge experiences a force opposite to the direction of the field.
(ii) The tangent drawn to a line of force represents the direction of electric field.
(iii) The electric field lines never intersect.
(iv) The electric field lines form a closed loop.
HARD
Within a spherical charge distribution of charge density ρr,  N equipotential surfaces of potential V0, V0+V, V0+2V,V0+NV V>0, are drawn and have increasing radii r0, r1, r2,rN, respectively. If the difference in the radii of the surfaces is constant for all values of V0 and V then :
EASY
What are electric field lines? Mention any two of its properties.
EASY

The electric field lines on the left have twice the separation on those on the right as shown in figure. If the magnitude of the field at A is 40 Vm-1, what is  the force on 20 μC charge kept at

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EASY

The electric field lines of a positive charge is as shown in figure:

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Give the sign of work done by the field in moving a small positive charge from 'Q' to 'P'.

EASY
Why two electric lines of force/field cannot intersect each otheq?
MEDIUM
An ideal gas is enclosed in a cylinder at pressure of 2 atm and temperature, 300 K. The mean time between two successive collisions is 6×10-8 s. If the pressure is doubled and temperature is increased to 500 K, the mean time between two successive collisions will be close to:
HARD
A point charge +Q is placed just outside an imaginary hemispherical surface of radius R as shown in the figure. Which of the following statements is/are correct?

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EASY
What is the angle between maximum value of potential gradient and equipotential surface?
EASY

Figure shows three arrangements of electric field lines. In each arrangement, a proton is released from rest at point A and then accelerated through point B by the electric field. Points A and B have equal separations in the three arrangements. If p1,p2 and p3 are linear momentum of the proton at point B in the three arrangement respectively, then

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MEDIUM

A small point mass carrying some positive charge on it, is released from the edge of a table. There is a uniform electric field in this region in the horizontal direction. Which of the following options then correctly describe the trajectory of the mass ? (Curves are drawn schematically and are not to scale)