How does something become charged

The same reasoning leads one to reject choice F and G as possible true statements; the suggest that protons can be added or removed. An object which attracts neutral attracts paper bits and repels a negatively-charged balloon. An object which attracts a negatively-charged balloon and attracts a positively-charged balloon.

An object which attracts a charged balloon balloon A which is attracted to a negatively-charged balloon balloon B. An object which attracts a balloon balloon C which is repelled by a negatively-charged balloon balloon D. An object which repels a balloon balloon E which is repelled by a positively-charged balloon balloon F. Protons are positive; electrons are negative; more protons than electrons would mean an overall positive charge. Neutrons are neutral and will not have an influence on the overall charge.

If a neutral object gains some electrons, then it will possess more electrons negative charge than protons positive charge ; the object will have an overall - charge. A negatively charged object would never be attracted to a - balloon. An object which attracts neutral paper bits must be charged. If an object has a repulsive interaction with any other object, then it is definitely charged. Since like charges repel, the charge which it has is the same type of charge as the charge on the object which it repels.

This object has a - charge. Only a neutral object could do this. Balloon C must be - since it repels another - balloon like charges repel.

This object must have a - charge. Object A is charged by friction using animal fur. Animal fur has a greater electron affinity than object A. Object A is used to charge an aluminum plate by the method of induction.

The aluminum plate acquires a positive charge. The aluminum plate acquires a negative charge. A rubber rod has a greater electron affinity than animal fur. The rubber rod is charged by friction with animal fur. The rubber rod is then used to charge Object A by the method of contact.

The rubber rod is then used to charge Object A by the method of induction. The rubber rod is then used to charge an aluminum pop can by the process of induction. The pop can is then contacted to object A. When two objects are charged by friction, electrons are transferred between objects. The object made of a material with the greatest electron affinity is the object which receives the electrons; the other object loses electrons.

When charging an object by contact, the object receives the same type of charge as the object used to charge it. When charging an object by induction, the object receives the opposite type of charge as the object used to charge it. The answer to question 12 includes a detailed explanation of the induction charging method. Since induction charging gives objects opposite types of charge, Object A must have an opposite charge as the aluminum plate. The same reasoning used in iv.

The rubber rod must become charged negatively since it would acquire electrons from the animal fur. It would then charge Object A with the same type of charge - since contact charging results in charging an object with the same type of charge.

The aluminum plate would then charge Object A positively since contact charging results in charging an object with the same type of charge. A neutral plastic strip is rubbed with cotton and acquires a positive charge. Which of the following statements are true of the positively-charged strip? During charging by friction, electrons are transferred from one object to the other object.

Charging by friction results in two objects with the opposite type of charge. If the two rubbed objects are brought near, then they will attract rather than repel since they are charged oppositely. Protons are never gained or lost during ordinary electrostatic experiments. They are tightly bound in the nuclei of atoms; it would require an atom-smasher to induce protons to move. The object which has the greater electron affinity is the one which acquires the - charge during the friction charging process.

A neutral object like paper could only attract a charged object like the plastic; repulsion is only observed of two charged objects having the same type of charge. Since it has lost electrons, the plastic will have an excess of protons.

If a positively-charged object is used to charge an electroscope by induction, then the electroscope would acquire a - charge. Induction charging results in objects with opposite types of charge.

There is no such thing as positive electrons at least not for our purposes. As you may have noticed, talk of neutrons in a unit on electrostatics is largely absent. Neutrons have nothing to do with the discussion. A positively-charged glass rod is touched to the plate of a neutral electroscope. Upon contact, the electroscope becomes charged and the needle deflects.

Which of the following statements are true of the charged electroscope? A charged object will experience non-contact force from another charged object. The type of force will depend on the type of charge positive or negative on the two objects. The properties of attraction and repulsion are often used to show that an object is charged:. If a negatively charged plastic rod is brought near to another negatively charged rod, they will move apart as they repel each other.

If a positively charged rod is brought close to a negatively charged rod, they will pull together as they attract each other. The forces of attraction or repulsion are greater when the charged objects are closer. If a cloth rubs a plastic rod and the cloth is pulled away from the rod slightly, will the rod and cloth attract, repel or experience no force at all? When a polythene rod is rubbed with a duster, the friction causes electrons to gain energy.

If the rod is swapped for a different material such as acetate , electrons are rubbed off the acetate and onto the duster. Both of 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 hold the charge, as the electrons can move through them. A charged object will experience a non-contact force from another charged object.

The type of force will depend on the type of charge positive or negative on the two objects. The properties of attraction and repulsion are often used to show that an object is charged:.