Recent content by Better WOrld

Sir, I couldn't understand how the Gaussian surface looks. Is it along the periphery of the 2 balls when they just touch each other? Sir, I don't know the answer to this. I know that the flux remains constant, but I'm not sure about the electric field. I don't think that it should remain...

Sir I tried, but I couldn't calculate it. Please could you show me how to?

Sir isn't potential with respect to a point? So which point do we take potential about? The potential of any spherical shell at an interior point is ##-kQ/R## where R is its radius.

Sir, is it ##-2k\dfrac{kq}{r}## where ##r## is the separation between the centers of the 2 spheres?

Sir please could you show me how to write V in terms of q, the charge magnitudes at that instant and R? Could you also explain what you mean by 'there is a doubling up'? Sir, ##Q\to 0## since charge packets move gradually away from the sphere with ##+Q## charge initially. Lastly Sir, I think...

Sir I'm not yet comfortable with the idea of small packages of charge. How would 'packages of charge' move in place of the spheres themselves. If the spheres themselves are not moving as individual units, why is it mentioned in the question that the ##balls## can interpenetrate? Thus, I'm not...

So the charge would get neutralised ie there would be no charge on the surface?

Isn't it the same?

Could you please show me how to calculate it? I know that the ##Potential## at its center is ##-\dfrac{kQ}{R}##

Sir, assuming that I understand properly, would the surface charge density become ##2\rho##?

I'm not really sure about this, but the balls would be similar to solid charged spheres. Now the field (and consequently the force due to the sphere) at any external point is as though the sphere acts as a point particle. So in this case, why should the Potential Energy not be ##-\infty##? Also...

So initially, the total energy would be 0 (assuming U - Potential Energy at ##\infty## is 0). Shouldn't the speed be maximum at the instant they pass through each other? Also by conserving energy, at the moment the balls pass through each other, r (separation between them) becomes 0. Thus U...

Homework Statement Consider two balls of equal radii and masses but opposite charges, distributed uniformly over their volumes. Initially, the balls are at rest and far away from one another. Due to the Coulomb attraction, the balls start moving towards each other. The balls can be treated as...

Sir I was unable to do so. Sir I was just thinking about the physical possibility of the situation, and it seems that t=such a situation (2 forces in opposite directions with a separation between their points of impact, and yet no angular acceleation) is not possible for the rod. Is that why I...

Sorry Sir, it should be mg ie the weight.