Why do pith balls repel each other?

Electrons from the rod move to the pith ball giving the pith ball an excess of negatively charged electrons (a net negative charge). See Figure 4. This is known as electrostatic conduction. Now that both the rod and the pith ball have the same negative charge, they repel each other.

What happens to the pith balls What occurs to the charges of both pith balls?

When a charged rod is brought close to the pith balls, their charges polarize. If they come in contact with the charged rod, they can inherit the same sign charge. when similarly charged, the pith balls behave like siblings and refuse to touch each other.

What happens to the Coulomb electric force between two charges when the distance between them doubles?

The size of the force varies inversely as the square of the distance between the two charges. Therefore, if the distance between the two charges is doubled, the attraction or repulsion becomes weaker, decreasing to one-fourth of the original value. The size of the force is proportional to the value of each charge.

What does this tell you about the force between the pith balls?

A charged pith ball works well to show the Coulomb force between two charged objects. If a glass rod is rubbed with silk, the silk rubs some electrons off the rod. Touching the positively-charged rod to two pith ball gives the balls each a small positive charge.

What is the mass of a pith ball?

5.0g
Mass of each pith ball is m=5.0g=5.0×10−3kg.

How is increasing the mass of the pith balls similar to increasing the value of G?

Sample answer: The force of gravity on the pith balls is equal to the product of mass and g. Therefore, increasing mass has the same effect as increasing g.

Why the pith ball first gets attracted towards the glass rod?

A plastic rod is charged by rubbing with cloth. The charged rod is brought close to the pith ball without touching it. It is observed that the charged rod weakly attracts the pith ball. We conclude that two electric charges repel each other.

What is a pith ball made of?

A pith ball is a light ball whose surface is coated with a conductive material. (Pith is the spongy material found inside most vascular plants, or other plant tissue that has a similar consistency. Nowadays, most pith balls are probably made of styrofoam or other similar material.)

What happens to the electric force between two charges if the magnitude of one of the charges is halved?

Explanation: The force between the two charges is directly proportional to the product of the charges and inversely proportional to the square of the distance between them. Hence, if distance between charges is halved (charges remaining kept constant), the force between the two charges is quadrupled.

Is a pith ball a conductor?

How does the strength of electrostatic force is relate to the charges on the balls?

The negative sign is put in front of the mg in the equation. Do not also give 9.8 m/s2 a negative sign, or you will double count the direction. The pith ball has been deflected to the left—it remains at rest at a 15o angle. In other words, it is in equilibrium and the acceleration of the pith ball is zero.