help@askiitians.com

+91-87964 74404

Grade 12th passElectrostatics

The electric field by an uniformly charged infinite plane is independent of distance but practically if we move away from the charged plane electric filed should decrease. Why is it so?

kunal mehta

12 Years agoGrade 12th pass

1 Answer

Arun Kumar

12 Years ago

Hi

Consider a finite plate as a collection of finite line charge.

Now for a finite line charge and for easier calculation and demonstration assume you finding E at middle.

In practical situation you can't practically assume it to be an infinite line charge without errors.

$\\E_x=\frac{\lambda(sin{\theta_1}+sin\theta_2)}{4\epsilon_0 \pi d}=\frac{\lambda sin\theta}{2\epsilon \pi d} \\E_y=\frac{\lambda(cos{\theta_1}-cos\theta_2)}{4\epsilon_0}=0 \\$where all $\theta$ are the angle subtended by perpendicular line joining point to rod and line joining point to one of the ends and incase of point is at middle it its equal$ \\$d is the perpendicular distance from point to line$ \\$so $\frac{sin\theta}{d}=\frac{l}{2*d*\sqrt{d^2+\frac{l}{2}^2}} \\$so now we can see if we increase the distance field decreases$$

Thanks & Regards, Arun Kumar, Btech,IIT Delhi, Askiitians Faculty

Electrostatics question based on earthing of spherical shell

electrostatics

1 Answer Available

Last Activity: 3 Years ago

an object has a charge of 2c and gains 10^19 electrons. the net chaarge on the object becomes??

electrostatics

1 Answer Available

Last Activity: 4 Years ago

A wire with a linear charge density lambda forms a quarter of a cjrclenof radius R and is placed asa shown in thefigure with its centre of curvature at the origin O the electric field at O will be

electrostatics

1 Answer Available

Last Activity: 4 Years ago

Find the value of q so that system remains in equilibrium.. figure attached below

electrostatics

1 Answer Available

Last Activity: 4 Years ago

Need to find the time taken for the dipole to come back to eqm

electrostatics

1 Answer Available

Last Activity: 4 Years ago

View all Questions