Break the rod into N pieces (where you can change the value of N). For each tiny little piece, calculate the charge and the position. The charge of each piece would just be Q/N. Find the vector that goes from each piece of the rod to the point where you want to find the electric field.
Table of Contents
What charge is acquired by the metal rod?
In this case, electrons are transferred from the neutral object to the positively charged rod and the sphere becomes charged positively. 4. A metal sphere is electrically neutral. It is touched by a positively charged metal rod.
What is the charge on the rod?
When you rub the plastic rod (polyethylene terephthalate, glycol modified, or PETG) with the wool cloth, the rod charges negative. When you rub the glass rod with the silk, the rod charges positive.
Is the rod positively or negatively charged?
If you rub a glass rod with a cloth, the charge produced on the glass rod is called positive, whereas when a plastic rod is rubbed with a cloth, the charge produced on the plastic rod is negative.
What is electric field due to Rod?
If the charge present on the rod is positive, the electric field at P would point away from the rod. If the rod is negatively charged, the electric field at P would point towards the rod. In either case, the electric field at P exists only along the x-axis.
How do you find the electric field due to a charged rod?
Can you charge a metal rod?
No, because human body is a good conductor and charge produced on the metallic rod will be transferred to the earth through our body.
When a negatively charged rod is brought near?
When a negatively charged rod is brought near the cap of a gold leaf electroscope whose case is earthed, then 1) Leaves will have induced positive charge 2) Positive charge is induced on one leaf and negative on the other.
What happens to the electrical charges when a charged metal rod is placed near the electroscope?
When the negatively-charged rod is brought close to the electroscope, positive charges are attracted to it and negative charges are repelled away from it.
What charge that has the glass rod and the fur?
The correct answer will be the option-(A) Positive charge. When we rub a glass rod with fur, the glass rod will acquire a positive charge and fur will acquire a negative charge, according to triboelectric series.
Can metal be charged?
Explanation: While you can charge a dielectric (non conductive, like plastic) object rubbing, you cannot charge a conductor (like a metal) rubbing. The reason is that in a metal the charges are free to move inside the material.
What happens when the paper touches the rod?
When the positively charged rod is brought near the neutral paper, it induces a negative charge on the side of the paper nearer to the rod. Since unlike charges attract each other, the paper will be attracted to the rod. When the paper touches the rod, it does not get discharge as it is an insulator.
Why does a charged rod attracts paper?
This is because the positively charged rod attracts the electrons of a paper piece towards itself. Some of the electrons accumulate at that edge of the paper piece which is closer to the rod. At the farther end of the piece there is a deficiency of electrons and hence positive charge appears there.
Why is glass negatively charged?
We can now interpret what is happening with the glass/plastic rod experiments. Glass happens to lose electrons easily, and silk grabs them away from the glass atoms, so after rubbing the glass becomes positively charged and the silk becomes negatively charged. Plastic has the opposite tendency.
What is the formula of electric field due to a line charge?
In this case field is given by equation โE=ฮป2ฯฯต0x^i E โ = ฮป 2 ฯ ฯต 0 x i ^ This is the electric field due to an infinite long line of charge.
What is electric field equation?
We can use the equation E = k | Q | r 2 E = k | Q | r 2 to find the magnitude of the electric field. The direction of the electric field is determined by the sign of the charge, which is negative in this case.
Is density a charge?
The charge density is the measure of electric charge per unit area of a surface, or per unit volume of a body or field. The charge density tells us how much charge is stored in a particular field. Charge density can be determined in terms of volume, area, or length.
Why is water attracted to a charged rod?
A positively charge can be produced by rubbing acetate with silk. Some students may predict that the stream should be repelled away from the positively charged rod. In fact, the water stream is attracted by the rod because the negative oxygen ends of the water molecules are attracted to the positively charged rod.
What is the electric field due to an infinite line of charge?
The magnitude of the electric field produced by a uniformly charged infinite line is E = ฮป/2ฯฯต0r, where ฮป is the linear charge density and r is the distance from the line to the point where the field is measured.
What is the electric field due to semi infinite wire?
โฃE โฃ=KR2 ฮป
Why does a metal rod not become charged?
Both the rods and the duster are made of insulating materials. Insulators prevent the electrons from moving and the charge remains static . Conductors , on the other hand, cannot become charged, as the electrons can move through them.
Why can we not charge metal rod?
Solution : It is not possible to charge just one end of a metal rod because the charge will flow throughout the rod, the metal being a good conductor.
Why does a metal rod not become charged by rubbing?
Iron rod cannot be charged by rubbing when held in hand. Iron being a good conductor of electricity, transfer the charge produced on it into our body and is further transferred into the earth through our body. Therefore, the iron rod will continuously remain charge free.
When a positively charged rod is brought near?
Positively charged rod induces negative charge on the side of the sphere closer to the rod and an equal positive charge on the side away from the rod. When the rod is withdrawn, the negative charges move to neutralise the equal positive charge. The charge left is zero.
What is negatively charged rod is brought near but does not touch?
When a negatively charged rod is brought near, but does not touch, the initially uncharged electroscope shown above, the leaves spring apart (I). When the electroscope is then touched with a finger, the leaves collapse (II).