Following figure shows four situations in which positive and negative charges moves horizontally through a region and gives the rate at which each charge moves. Rank the situations according to the effective current through the region greatest first
For figure (i) $$i_1=7A$$
For figure (ii) $$i_2=4+3=7A$$
For figure (iii) $$i_3=5+2=7A$$
For figure (iv) $$i_4=6-1=5A$$
Three identical metal plates with large surface areas are kept parallel to each other As shown in figure. The leftmost plate is given a charge $$Q$$, the rightmost a charge $$-2Q$$ and the middle one remain neutral. Find the charge appearing on the outer surface of the rightmost plate.
A soap bubble is given a negative charge, then its radius
Two identical conducting sphere, fixed in place, attract each other with an electrostatic force of $$0.108\ N$$ when their center-to-center separation is $$50.0\ cm$$. The sphere are then connected by a thin conducing wire. When the wire is removed, the sphere repel each other with an electrostatic force of $$0.0360\ N$$. Of the initial charges on the sphere, with a positive net charge, what was the negative charge on one of them?
Calculate the number of coulombs of positive charge in $$250\ cm^{3}$$ of (neutral) water. (Hint: A hydrogen atom contains one pro eight protons.)
Two identical conducting sphere, fixed in place, attract each other with an electrostatic force of $$0.108\ N$$ when their center-to-center separation is $$50.0\ cm$$. The sphere are then connected by a thin conducing wire. When the wire is removed, the sphere repel each other with an electrostatic force of $$0.0360\ N$$. Of the initial charges on the sphere, with a positive net charge, what was the positive charge on the other?
If a cat repeatedly rubs against your cotton slacks on a dry day, the charge transfer between the cat hair and the cotton can leave you with an excess charge of $$-2.00 \mu C$$. Just before the spark appears, do you induce positive or negative charge in the faucet?
The number of electrons and protons in an atom are same.
In induction, a positively charged body can make an uncharged body positively charged.
What are the two kinds of charges?
Describe an experiment to demonstrate that there are two $$ r $$ kinds of charges.