MEDIUM
JEE Main
IMPORTANT
Earn 100

Find the electric field at point P (as shown in figure) on the perpendicular bisector of a uniformly charged thin wire of length L carrying a charge Q. The distance of the point P from the centre of the rod is a=32L

Question Image

55.56% studentsanswered this correctly

Important Questions on Electrostatics

MEDIUM
JEE Main
IMPORTANT

Given below are two statements
Statement I : An electric dipole is placed at the centre of a hollow sphere. The flux of electric field through the sphere is zero, but the electric field is not zero anywhere in the sphere.

Statement II : If R is the radius of a solid metallic sphere and Q be the total charge on it. The electric field at any point on the spherical surface of radius r<R is zero but the electric flux passing through this closed spherical surface of radius r is not

In the light of the above statements, choose the correct answer from the options given below:

HARD
JEE Main
IMPORTANT
27 similar drops of mercury are maintained at 10 V each. All these spherical drops combine into a single big drop. The potential energy of the bigger drop is ___________ times that of a smaller drop.
HARD
JEE Main
IMPORTANT

A charged particle (mass m and charge q) moves along X axis with velocity V0. When it passes through the origin it enters a region having uniform electric field E=-Ej^ which extends upto x=d. Equation of path of electron in the region x>d is:

Question Image

HARD
JEE Main
IMPORTANT
5 μF capacitor is charged fully by a 220 V supply. It is then disconnected from the supply and is connected in series to another uncharged 2.5 μF capacitor. If the energy change during the charge redistribution is X100 J then value of X to the nearest integer is :
MEDIUM
JEE Main
IMPORTANT
10 μF capacitor is fully charged to a potential difference of 50 V After removing the source voltage it is connected to an uncharged capacitor in parallel. Now the potential difference across them becomes 20 V. The capacitance of the second capacitor is :
MEDIUM
JEE Main
IMPORTANT

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)

EASY
JEE Main
IMPORTANT

A charge Q is distributed over two concentric conducting thin spherical shells radii r and R R>r. If the surface charge densities on the two shells are equal, the electric potential at the common centre is : 

Question Image

HARD
JEE Main
IMPORTANT
Two isolated conducting spheres S1 and S2 of radius 23R and 13R have 12 μC and -3 μC charges, respectively, and are at a large distance from each other, They are now connected by a conducting wire. A long time after this is done the charges on S1 and S2 are respectively: