Is it necessary for a charged body to actually touch the ball of the electroscope for the leaves to diverge? No. It is not necessary for the charged body to touch the ball of an electroscope.
Is it necessary for a charged body actually to touch the ball of the electroscope?
Solution 13E No, it’s not necessary for a charged body actually to touch the ball of the electroscope for the leaves to diverge. When you touch the charged object with the ball, some electrons flow from the body to the ball and you can observe a deflection in the electroscope.
Why will dust be attracted to a DVD wiped with a dry cloth?
During the wiping process either electrons are transferred to the cloth from the CD or from the CD to the cloth. In either case the CD becomes charged. The charge produces an electric field which polarizes dust particles near it and the polarized dust particles are then attracted to the charged CD.
How do electrical field lines indicate the strength of an electric field?
The strength of the electric field depends on the source charge, not on the test charge. ... A line tangent to a field line indicates the direction of the electric field at that point. Where the field lines are close together, the electric field is stronger than where they are farther apart.
How can a charged atom an ion attract a neutral atom?
How can a charged atom attract a neutral atom? An ion polarizes a nearby neutral atom , so that the part of the atom nearer to the ion acquires a charge opposite to the charge of the ion, and the part of the atom farther from the ion acquires a charge of the same sign as the ion.
Would it be necessary for a charged object to actually touch the leaves of an Electroscope See Question 29 for the leaves to diverge?
Is it necessary for a charged body to actually touch the ball of the electroscope for the leaves to diverge? No. It is not necessary for the charged body to touch the ball of an electroscope.
Why do clothes often cling together?
When two surfaces rub against each other, electrons are transferred from one surface to the other. ... Clothes cling together after tumbling due to the establishment of opposite charges on the cloth surfaces when electrons are transferred between surfaces .
Would you feel any electric effects if you were inside the charged sphere of a Van de Graaff generator?
Solution 59E No electrical effects will be felt as the net electric field inside the sphere of Van de Graaff generator will be zero . The electric charges will be there on the outer surface of the sphere.
What happens to the force between a pair of charged particles when one of the charged particles triples?
Coulomb’s Law is an inverse-square law, meaning the force is inversely proportional to the square of the distance. For example, if the distance between the particles is tripled, the force is divided by a factor of 9 . ... The force is reduced to 1/4 of its original value, no matter the sign of the original charges.
Why do field lines never cross?
So if two lines intersect at any point then two tangents can be drawn at one point indicates two directions ofelectric field, which is not possible because at any point there is only one direction of field . That is why theynever cross each other.
Why do electric field lines go from positive to negative?
The direction of the electric field is always directed in the direction that a positive test charge would be pushed or pulled if placed in the space surrounding the source charge. ... As such, the lines are directed away from positively charged source charges and toward negatively charged source charges.
Why is charge usually transferred by electrons?
Electrons are not affected by the strong force, and so they only get trapped by the electrical attraction to the nucleus which is much weaker in ionized atoms. Therefore it is easier for electrons to move away from one atom to another, transferring charge.
Why are electric fields important?
Electric fields provide us with the pushing force we need to induce current flow . An electric field in a circuit is like an electron pump: a large source of negative charges that can propel electrons, which will flow through the circuit towards the positive lump of charges.
Are neutral atoms attractive?
Because neutral atoms have their negative particles in one place and positive in another, the negatives do not totally cancel out the positives, consequently there is always some attraction between the nucleus of one atom to the electrons of another.
Do positive ions attract each other?
Ions are atoms or molecules which are electrically charged. Cations are positively charged and anions carry a negative charge. ... These oppositely charged ions attract each other to form ionic networks (or lattices). Electrostatics explains why this happens: opposite charges attract and like charges repel.
Can an object be charged negatively with the help of a positively charged object?
Losing electrons results in more positive charge than negative charge, making the object charged positively. Gaining electrons results in more negative charge than positive charge, making the object charged negatively.
Why do electric field vectors point away?
The electric field is a vector field around a charged particle. It represents the force that other charged particles would feel if placed near the particle creating the electric field. ... If the point charge is positive, field lines point away from it; if the charge is negative, field lines point toward it.
Why do some clothes cling together after being removed from the clothes dryer does this happen if they are still damp?
Why do some clothes cling together after being removed from the clothes dryer? Does this happen if they’re still damp? The dryer charges the clothes . If they are damp, the presence of water molecules suppresses the charge.
When an object acquires a positive charge what happens to its mass?
14. When an object acquires a positive charge, it loses electrons and its mass decreases .
When combing your hair you scuff electrons?
When combing your hair, you scuff electrons from your hair onto the comb. Is your hair then positively or negatively charged? Your hair will have a positive charge . You just studied 2 terms!
Why do clothes often cling together after tumbling in a clothes dryer if no dryer sheet is added )?
Some surfaces get positively charged, and others get negatively charged, so they attract one another. ... And this static charge causes your clothes to cling together. Pourdeyhimi says dryer sheets contain positively-charged ingredients that are released by the heat and tumbling motion of the dryer.
What happens when you walk across a room and your shoes rub against the carpet?
Static electricity is the result of an imbalance between negative and positive charges in an object. ... For example, if you rub your shoe on the carpet, your body collects extra electrons . The electrons cling to your body until they can be released. As you reach and touch your furry friend, you get a shock.
Is it safe to touch a Van de Graaff generator?
Don’t touch the Van de Graaff generator with your bare hand because this will cause a quick discharge.
Why do Van de Graaff generators shock you?
Generally, the stored charges on the Van de Graaff generator want to try to get into the ground. The earth is very big and the negatively charged particles (electrons) can get very far away from each other. ... If you touch the generator , all that electricity will go through your body giving you a big shock.
What two factors are necessary to determine the electrostatic force on a pair of charged particles?
That the two factors influencing the electrostatic force are the magnitude of the charges and the separation distance between them .
What happens to the force when the separation of the charged particles 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 .
Can two electric force lines cross?
Electric field lines cannot cross . ... This is because they are, by definition, a line of constant potential. The equipotential at a given point in space can only have a single value. If lines for two different values of the potential were to cross, then they would no longer represent equipotential lines.
Why is E inside a charged rubber balloon?
Select the Gaussian surface inside the sphere and apply the Gauss law. Then Q becomes zero and hence E is zero, when the charge distribution is symmetric over the surface .
Can electric field exist without charge?
Yes. The an electric field can exist without a charge . BUT it cannot ORIGINATE without charge. EM waves comprise of electric and magnetic field in transit.
What would happen to the electrostatic force between a pair of charged particles if both charges were tripled and the distance between them were also tripled?
It would increase by a factor of 4 .
Do electric field lines actually exist?
No, they do not exist . Electric field lines are only imaginary. They are the paths along which an imaginary unit charge would move when free. Their number is infinite as paths (Electric field lines) can be infinite.
How important is electricity in your life?
Electricity is an essential part of modern life and it helps us in many different ways. We use electricity for lighting, heating, cooling, and refrigeration , for medical purposes and for operating appliances, electronics, computers, public transportation systems, and much more.
Is electricity positive or negative?
The electric current is made of positively charged atoms flowing one way and negatively charged atoms flowing the other. The same is true of current in salt water, in the ground, and in battery electrolyte.
Do electric field lines ever end?
Since the electric field is a vector, electric field lines have arrows showing the direction of the electric field. ... Lines begin and end only at charges (beginning at + charges, ending at – charges) or at Infinity. Lines are closer together where the field is stronger.
Why is the test charge always positive?
Why test charge is always taken as point charge and its value is positive? Answer: ... It is taken to be a point charge so that its dimensions are small and its magnitude is small enough so that it does not create its own stong field and interact with the field to be tested. It is taken as positive because of convention.
Can an electric field be negative?
An electric field can never be negative . An electric field is a force experienced by the charge divided by the magnitude of the charge. ... So even if the charge is negative in nature, its magnitude will also be positive and therefore, an electric field can never be negative.
Why do clothes often cling together?
When two surfaces rub against each other, electrons are transferred from one surface to the other. ... Clothes cling together after tumbling due to the establishment of opposite charges on the cloth surfaces when electrons are transferred between surfaces .
When a body become negative charged its mass?
So, if a body becomes negatively charged, it implies that it has gained electrons and hence its mass will increase . Whereas if a body becomes positively charged it loses electrons hence its mass will decrease.
Can you remove protons from a body to charge it?
you can’t really “remove” a proton from an atom in a way that “something happens” to the atom. The best you can do is to think about what a particular atom would be if it were to have one less proton (see below), but you can’t actually get one like that by taking some atom and removing a proton.
What happens if you try to move the atoms very close to each other?
When you try to move the atoms two close, their positive nuclei repel each other . 2. A covalent bond is an electric force of attraction between two atoms that share outer electrons. ... Each nucleus is attracting the other atom’s electron with increasing strength so it takes less energy to keep them apart.
Can atoms touch things?
Atoms can never touch in the way humans think of touching. Everything we think of as “touching” is actually the electromagnetic interaction of the valence electrons in the outmost shells of atoms, and they do no “touch in the maner of two ping pong balls, so must as “interact” in the maner of two magnets.
Which particle in an atom can you physically manipulate?
Summary: The same electrons that form images of atomic structures can also be used to move atoms in materials.
