Recent content by Premanand

Thank you for the links... It was helpful... The fast moving and slow moving electrons are related to current... Though we perceive current as flow of electrons, the actual velocity of electrons in DC current is actually very slow ( For a 12-gauge copper wire carrying a 10-ampere DC current...

So if the breakdown actually happens, then there will be flow of current provided the voltage is maintained by a power supply. However, current is not due to fast moving electrons (which are the charge carriers) but it is due to the slow moving electrons transferring energy at a quicker pace...

Sorry about that... I did not mean the dielectric is at that the same potential as the conductor, I meant that the potential of the conductor is unchanged. For instance, If I started with two plates, one at 80 kV and the other grounded separated by air of 75 mm. Say 75 mm is huge enough so that...

The energy required to move the charge through an equipotential surface is zero. Which means one can move the charge to sharp points at same potential without the expense of energy ? So I concentrated the charge at sharp point without expense of energy by virtue of geometry and let it rip...

Thank you... But is there an explanation for it? Because light can be slowed down/changed direction by matter but however, the velocity of the inertial frame of reference in which light originated does not have any influence on the speed of light ?

The speed of light is constant in all frame of reference... So the relative motion of the source of light and the frame of reference from which you are making measurement does not matter... Is it an Axiom in relativity ? I understand that they are experimentally proved concepts... But is it an...

Thank you... One more question... I was taught that electric potential is the energy that a charge would posses... So it means if the potential is high , the charge will have enough energy to cross the barrier of dielectric... However, even if the potential is low, if the points are sharp, it...

Hi... I want to know why charge density is higher at sharp points in a conductor? I have gone through the analogy of two spheres connected by a wire... But is there any other explanation which is not specific to spheres...?

Thank you... So on conceptual level... I can bend the space further by adding more mass? ... I mean adding mass increases 'the force of attraction' by bending the space 'more' ?

Thank you... Could u answer one more question please? Does adding mass to the object bends the space? Is the bent space a reason for increase in force of attraction when mass is increased?

Sorry... This question may be very basic. As a self taught, I understand that the mass will bend the space around it such that any other mass entering the bent space will immediately be pushed towards the center because of the bent space. Higher the mass, higher will be the bent (if that is the...

Thank you... I asked it because in linear motion any deceleration can potentially change the direction after a period of time once the magnitude diminishes to zero... For instance, as juyoung said, the magnitude which was +5 became zero in time '5 sec' , could have potentially reversed the...

Hi ... Can the change in direction happen without affecting the magnitude in case of linear motion ? Is there any example for it ? All that I could think of is a circular motion where there is a continuous change of direction without change in magnitude ...

Hmmm... What do you think will happen if I assume the vector as 0 east or 0 west ? All are trying to say that since it is a null vector and the magnitude is zero , it doesn't matter in which direction it acts. However , your question as I understand is ' should I take the loss in direction as...

Hmmm... k... So what will happen if it is a direction change. A force has to act on an object to cause change in direction. Since your object is decelerating, there is a force acting on it (though you said there is no friction) and hence if the change from motion to rest is termed as direction...