Recent content by phymathlover

Special rubber tires are made slightly conducting, in aircrafts, to enable them to pass on charge (produced by friction) to the ground, as too much charge may result in a spark and hence cause a fire. This is apparently the same reason why some vehicles usually have metallic ropes touching the...

A bird perches on a bare high power line and nothing happens to it. A man standing on the ground touches the same line and gets a fatal shock. This is supposed to be because there is potential difference between the ground and the line which the man touches but similarly, isn't there also a...

A comb run through dry hair attracts bits of paper. What happens if your hair is wet or it is a rainy day? I guessed that the comb would stop attracting paper, what bothers me is why. My book says its because if my hair is wet or its a rainy day, the friction between the comb and my hair...

Can we say that positive potential energy means energy is given out by the system when it is brought to the present state of configuration and negative potential energy implies that energy needs to be provided to the system to achieve the present state?

I don't understand what exactly a transistor does in a burglar alarm. I read somewhere that this is its application as a switch but isn't it the LDR which works like that in this particular circuit? It would be really helpful if someone could explain the working in detail, I can't seem to find...

Could you possibly give me a picture or something of the magnetic fields at the end. So that's the reason then? That the magnetic field lines are complicated? I'm still really confused, a little more detail would be really helpful

We just started magneto statics in school and were told about the use of magnetic monopoles for problem-solving reasons. So we were told that the magnetic length of a bar magnet differs from its geometrical length. I can't quite seem to figure out why we can't assume the monopoles to be right at...

Oh! Lol XD, now I recognize it XD I've used a path integral quite a few times myself while solving questions ... I just didn't know it was called that XP Thank you for clearing that up for me :) I'll love you for eternity if you could answer the remaining questions too :look:

I can now see the ridiculous length of my post XP Are we allowed to post many threads in the same forum at the same time? Like if I'd opened a separate thread for each one of my questions? I am having a little trouble visualizing this ... "This cancellation occurs for all points outside the...

I have no idea what the positive and negative sides of external fields are -_- But anyway, even if the charges cancel each other, the outer field shouldn't be affected by the presence or absence of charges right? I mean sure, the curve of the field lines changes and all but the field still...

I have a few questions pertaining to some concepts in electrostatics, I'd be grateful if someone would help me out. 1) When we place a positive point charge inside a hollow conducting sphere, at its center, field lines emerge uniformly from the sphere. Okay, easy enough. Now, if we place the...