When the charge is placed on the soap bubble, every part of the surface of the soap bubble has the same charge. So every part of the surface of the soap bubble will repel every other part of the surface which will increase the size (and hence radii) of the soap bubble.

gamma radiation

When charge is given to a soap bubble (whether positive or negative), these charges exerience repuisive forces due to the other charges. Hence they tend to move out. Hence the size of bubble increases.

The bubble will expand because the charged particles uniformly distributed on it causes them to repel each other due to the electrostatic force. This will happen to both positive and negatively charged bubbles because of the charge on it.

When a soap bubble is charged then it expands to decrease the surface Tension, i.e. to minimize the surface tension.

What’s left is a net positive charge on the soap bubble closest to the balloon and a net negative charge farther away.

When a negatively charged body is brought near the cap of a gold leaf electroscope whose case is earthed,then the electrons near the brass disc of the electroscope gets repelled and so they move from the brass disc to the leaves .

Similar to the results of a negatively charged rod, if a positively charged rod is brought near the knob of a neutral electroscope, it will attract some electrons up from the leaves onto the knob. This process allows a change in charge without actually touching the charged and uncharged objects to each other.

Answer. When a negatively charged object is brought near an electroscope the charge will induce a positive charge on the leaves. If the object touches the electroscope the negative charge will discharge the leaves that have the positive charge. Then the leaves will collapse.

The rod repels negative charge from the top of the electroscope. This creates an excess of negative charge at the leaves. The leaves having the same charge, are repelled, and spread. Hence the leaf dilates.

When woolen cloth is rubbed against the plastic, both wood and plastic get electrified due to friction produced while rubbing. So, plastic has greater electron affinity (ability to attract electrons) as compared to wool, therefore, plastic acquires negative charge and wool acquires positive charge.

When a platic rod is rubbed with wool the rod gains negative charge and wool gains positive charge . So the rod repels negative charge from the top of the electroscope this causes excess of negative charge on leave the leaves having the same charge are repelled and dilated.

Two positively charged objects repel each other, and the ball moves away from the glass when they are held in each other’s proximity. Then the glass rod is rubbed with the wool, and the wool sheds electrons onto the glass, giving it a negative charge.

Answer: Ebonite rod is a rod made by special vulcanized rubber. On rubbing the ebonite rod with fur, electrons move from fur to the ebonite rod. The electrons in fur are less tightly bound than electrons in ebonite and hence ebonite gets a negative charge.

When insulating materials rub against each other, they may become electrically charged . Electrons , which are negatively charged, may be ‘rubbed off’ one material and on to the other. The material that gains electrons becomes negatively charged. The material that loses electrons is left with a positive charge.

On rubbing an ebonite rod with wool, the electrons from the wool get transferred to the ebonite rod. The wool gets a deficiency of electrons and so it gets positively charged. On the other hand, the ebonite rod gets excess electrons and hence it gets negatively charged.

Explanation: When you rub plastic, you transfer electrons from one material to the other. Because plastic is an insulator, the electrons cannot flow through it so they effectively get stuck there – they are static. In a metal, the electrons would get conducted away (e.g. back to the material they have come from).

An ebonite rod is a bad conductor of electricity. On the other hand, a copper rod is a good conductor of electricity. Complete step by step answer: When an ebonite rod is held in hand, it can be charged by rubbing with a flannel.

Hence, When an ebonite rod is rubbed with wool, they get oppositely charged due to conduction and the statement is true.

When the glass rod is rubbed with silk clothes, glass quickly loses electrons, and silk takes electrons out of the glass rod. So after rubbing, the glass rod becomes positively charged and the silk gets negative charge.

When an ebonite rod is rubbed with fur it starts gaining electrons and therefore obtains negative charge and when glass rod is rubbed with silk cloth it starts losing electrons and therefore obtains positive charge. Therefore, by the law of static electric charges, two opposite charged objects attract each other.

Solution: When an ebonite rod is rubbed with fur, fur loses electrons and ebonite rod gains electrons. fur becomes positively charged and rod becomes negatively charged.

When two different materials are rubbed together, there is a transfer of electrons from one material to the other material. This causes one object to become positively charged (the electron loser) and the other object to become negatively charged (the electron gainer).

When you are rubbing the glass rod with the silk cloth, electrons are stripped away from the atoms in the glass and transferred to the silk cloth. This leaves the glass rod with more positive than negative charge, so you get a net positive charge.

When you rub an ebonite rod against a cloth the rod gets negatively charged and the fur gets positively charged. This is because some of the atoms of the ebonite rod is deposited to the cloth. Thus, making it negative and increasing the no.