Recent content by cherev

thanks...!

about kirchoff? Homework Statement can anybody explain why we write kirchhoff laws on RL circuit like -Ldı/dt -iR=0 shouldn't it be written like -Ldı/dt +iR=0 Homework Equations -Ldı/dt -iR=0 -Ldı/dt +iR=0 it is about signs and how we know inductans' poles + or -...

ı have 5th edition and its may be different because I am not in u.s.a but figure is showed in gauss law

but ı have seen a figure on serway physics which shows atractive force between neutral and positive charged point charge on page 786

but why neutral piece of paper and charged plastic rod attract each other

about coloumb? i wonder why two point charge whose magnitude 0 and +q(or smt different from zero charge) exert a coloumb force to one another .formula says there shoud be no force acting to each other(because of multiplication q1.q2=0) but there is an atraction between them . if this force...