Home
Class 12
PHYSICS
A large flat metal surface has a uniform...

A large flat metal surface has a uniform charge density (`+sigma`). An electron of mass m and charge `rho` leaves the surface at the point A with speed u and returns to it at point B. Disregarding gravity the maximum value of AB is

A

`(4u^(2)mepsilon_(0))/(sigmarho)`

B

`(u^(2).rhoepsilon_(0))/(msigma)`

C

`(2epsilon_(0)m u^(2))/(rhosigma)`

D

`(u^(2)sigmarho)/(epsilon.m)`

Text Solution

Verified by Experts

The correct Answer is:
C
Promotional Banner

Similar Questions

Explore conceptually related problems

A long thin flat sheet has a uniform surface charge density sigma . The magnitude of the electric field at a distance .r. from it is given by

A long straight wire carries a charge with linear density lamda . A particle of mass m and a charge q is released at a distance r from the the wire. The speed of the particle as it crosses a point distance 2r is

In the figure shown there is a large sheet of charge of uniform surface charge density 'sigma' .A charge particle of charge '-q' and mass 'm' is projected from a point A on the sheet with a speed 'u' with the angle of projection such that it lands at maximum distance from A on the sheet. Neglecting gravity, find the time flight

A large nonconducting sheet M is given a uniform charge density. Two unchared small metal rods A and B are placed near the sheet as shown in figure

A large nonconducting sheet M is given a uniform charge density. Two unchared small metal rods A and B are placed near the sheet as shown in figure

Two infinite plane sheets of charge A and B of positive charge have surface charge densities Ksigma and sigma , respectively. A metallic ball of mass m and charge +q is attached to a thread and the thread is tied at point P on sheet A. Initially ball is equilibrium at plate P when sheets are uncharged. Find the correct options (K is a constant.)

(a) Use Gauss's theorem to find the electric field due to a uniformly charged infinitely Iarge plane thin sheet with surface charge density. Sigma (b) An infinitely large thin plane sheet has a uniform surface charge density + sigma . Obtain the expression for the amount of work done in bringing a point charge q from infinity to a point , distant r, in front of the charged plane sheet.

A hemispherical bowl of radius R carries a uniform surface charge density sigma . Find the potential at the topmost point A, taking potential at infinity to be zero.

A large sheet carries uniform surface charge density sigma . A rod of length 2l has a linear charge density lambda on one half and -lambda on the second half. The rod is hinged at the midpoint O and makes an angle theta with the normal to the sheet. The torque experience by the rod is

A simple pendulum of length l and bob mass m is hanging in front of a large nonconducting sheet having surface charge density sigma . If suddenly a charge +q is given to the bob & it is released from the position shown in figure. Find the maximum angle through which the string is deflected from vertical . .