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Salt is made up of charged ions, namely the sodium (Na+) and chloride (Cl-). The balloon repels one of the two ions, but more strongly attracts the other.
Most of us know how opposite charges attract and like charges repel (if you didn't, you do now), so consider the balloon as being, for instance, positively charged (the charge we choose does not matter, as we simply consider the ions as acting in the opposite manner to how I shall describe). The positive charge pushes the sodium ions in the salt crystals slightly away from it, whilst pulling the negative chloride ions towards it a small amount. It is important to consider only small changes, as the ions are held fairly rigidly in the ionic lattice structure in the salt, and we are not tearing apart the individual components of the crystals with something as rudimentary as an inflated sack of rubber we've been rubbing on our head for a few seconds - think of the chaos. However the difference in distances between the centres of positive and negative charge and the balloon have a significant effect. The centre of positive charge is further from the balloon than the negative charge (though by a small amount). Therefore the force of attraction overcomes that of repulsion, as the magnitude (size) of the force is determined both by the magnitude of the charges involved (which are equal as the overall charge of salt should be 0/uncharged - ie same amount of negative chloride as positive sodium - and the balloon has a charge that is used in both calculations) and on the distance. Think of a magnet and a paperclip: the further you are, the less force between the magnet and paperclip, the closer you are, the greater this force - ie you bring a magnet towards a paperclip in order to lift it up from a table, say. Therefore adding these forces together results in the salt being slightly attracted to the balloon.
What else can I help you with?
Will a balloon attract an aluminum can when charged?
No.
How rubbing the balloon on your hair and your hair will stick onto the balloon?
Rubbing a balloon on your hair creates static electricity, which causes your hair to have a positive charge. The balloon, in turn, becomes negatively charged. Opposite charges attract, so the negatively charged balloon will attract the positively charged hair, causing it to stick to the balloon.
Why does paper stick to a balloon?
When you rub a balloon against your hair or clothes, it becomes charged with static electricity. The paper is also charged with static electricity, and opposites attract - the negatively charged paper sticks to the positively charged balloon.
What will happen when balloon is rubbed with polythene it will attract a piece paper or not?
When a balloon is rubbed with polythene, electrons transfer between the two materials causing the balloon to become negatively charged. The negatively charged balloon will attract the neutral piece of paper due to the electrostatic force between opposite charges.
Will a charged balloon attrack or repel a full soda can?
A charged balloon will attract a full soda can. The balloon will induce a polarized charge distribution on the can, causing opposite charges to be attracted to each other.
Why a charged balloon is attracted by uncharged balloon?
When a balloon is charged, it gains an excess of either positive or negative charge. An uncharged balloon is neutral, so it does not exert any electrostatic force. The charged balloon is then attracted to the uncharged balloon due to the electrostatic force between them, as opposite charges attract each other.
A balloon will stick to a wooden wall if the balloon is charged?
Yes, the balloon can stick to a wooden wall if it is charged. This is because objects with opposite charges attract each other, causing the balloon to stick to the wall due to the electrostatic force.
Why does a charged balloon attract on small bits of paper?
The charged balloon creates an electric field around it, which polarizes the small bits of paper, causing them to be attracted towards the balloon. This is due to the interaction between the charged balloon's electric field and the charges within the paper.
Why a charged balloon sticks with the wall?
A charged balloon sticks to a wall because of static electricity. The balloon becomes charged when rubbed against hair or clothing, causing it to attract the opposite charge on the wall. This attraction leads to the balloon sticking to the wall until the charges dissipate.
What happens when you try to stick a charged balloon an a metal doorknob?
The excess charge on the balloon will induce an opposite charge in the doorknob, causing them to attract each other. When the balloon comes into contact with the doorknob, electrons will flow from the balloon to the doorknob, neutralizing the charge on the balloon.
What will happen if you rub a balloon with your hand?
Rubbing a balloon with your hand will cause the balloon to become negatively charged. This is due to the transfer of electrons from your hand to the balloon, creating a static electric charge. The negatively charged balloon can then attract positively charged objects or even stick to certain surfaces due to static electricity.
A charged balloon illustrates that something can have?
A charged balloon illustrates that something can have an electric charge. The balloon becomes negatively charged when rubbed against another object, causing it to attract positively charged objects or repel negatively charged objects. This demonstrates the presence of electrical forces in the balloon.
