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When a charged rubber rod touches an electroscope the metal leaves separate because?
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Why do the leaves of an electroscope spead apart when a charged object touches the metal knob?
The charged object charges both leaves of the electroscope with like charges and like charges repel.
Why do leaves of gold leaf electroscope expand when a charged body touches it?
They both get charged with the same polarity, and therefore repel each other.
Why must a sphere rod and leaves of an electroscope be a conductor?
When a negatively charged rod touches the sphere of the electroscope, negative sharge spreads throughout the metal. Since the leaves are both negatively charged, the free ends repel and move away from each other. When a positvely rod touchs the sphere, negative charges move toward the sphere, causing the leaves to be positively charged. hope this helps :)
What kind of charge the electroscope can detect?
The sphere of an electroscope is always neutral at first. Let's say a negative ebonite rod is brought close but not touching the sphere. (The entire electroscope is neutral). The electrons in the electroscope will want to repell the electrons in the rod so the electrons in the electroscope move down into the 2 leaves and then repell because there is a high concentration of negatives. When the ebonite rod is removed, the leaves go back to their straight position. The electroscope is always neutral but only a charge distibution occured. The number of protons and electrons remain the same. However if a charged rod touches the sphere then the electroscope will be charged because it a conductor and the charge from the rod transfers to the electroscope because the rod's caharges want to attarct to the electroscope's opposite charges. This is called charging by contact.
Would a negatively charged balloon stick to a metal rod?
No. It is not possible. Because as soon as balloon touches the metal charges would be conducted.
Why do the leaves of an electroscope repel each other when a charged object touches a metal knob?
Because when the charged object is say, negatively charged, the electrons in the electroscope want to get as far away as possible from the negative object because "like" charges REPEL. so when the electrons in the electroscope move to the leaves , they now are both negative and "like" charges so now the leaves want to get away from each other as well and that's why they separate.
Why do the leaves of an electroscope spead apart when a charged object touches the metal knob?
The charged object charges both leaves of the electroscope with like charges and like charges repel.
Why do leaves of gold leaf electroscope expand when a charged body touches it?
They both get charged with the same polarity, and therefore repel each other.
Why do the leaves of an electroscope repel each other when a charged object touches the knob?
Because when the charged object is say, negatively charged, the electrons in the electroscope want to get as far away as possible from the negative object because "like" charges REPEL. so when the electrons in the electroscope move to the leaves , they now are both negative and "like" charges so now the leaves want to get away from each other as well and that's why they separate.
Why must a sphere rod and leaves of an electroscope be a conductor?
When a negatively charged rod touches the sphere of the electroscope, negative sharge spreads throughout the metal. Since the leaves are both negatively charged, the free ends repel and move away from each other. When a positvely rod touchs the sphere, negative charges move toward the sphere, causing the leaves to be positively charged. hope this helps :)
What kind of charge the electroscope can detect?
The sphere of an electroscope is always neutral at first. Let's say a negative ebonite rod is brought close but not touching the sphere. (The entire electroscope is neutral). The electrons in the electroscope will want to repell the electrons in the rod so the electrons in the electroscope move down into the 2 leaves and then repell because there is a high concentration of negatives. When the ebonite rod is removed, the leaves go back to their straight position. The electroscope is always neutral but only a charge distibution occured. The number of protons and electrons remain the same. However if a charged rod touches the sphere then the electroscope will be charged because it a conductor and the charge from the rod transfers to the electroscope because the rod's caharges want to attarct to the electroscope's opposite charges. This is called charging by contact.
Would a negatively charged balloon stick to a metal rod?
No. It is not possible. Because as soon as balloon touches the metal charges would be conducted.
How do objects become negatively charged using the contact method?
when a negatvely charged object touches a neutrally charged object electrons move to the neutraly charged object making it negativly charged!
What continents does the mediteranean sea separate?
Europe and Africa (it also touches Asia but does not separate it from any continent)
Predict what would happen if you touched the knob of a positively charged electroscope with another positively charged object?
In order to test the presence of a charge on an object, the object is brought near to an uncharged pith ball. If the object is charged, the ball will be attracted to it and move toward it. The attraction occurs because of induced polarisation of the atoms inside the pith ball. The pith is a nonconductor, so the electrons in the ball are bound to atoms of the pith and are not free to leave the atoms and move about in the ball, but they can move a little within the atoms. If, for example, a positively charged object is brought near the pith ball, the negative electrons in each atom will be attracted and move slightly toward the side of the atom nearer the object. The positively charged nuclei will be repelled and will move slightly away. Since the negative charges in the pith ball are now nearer the object than the positive charges, their attraction is greater than the repulsion of the positive charges, resulting in a net attractive force. This separation of charge is microscopic, but since there are so many atoms, the tiny forces add up to a large enough force to move a light pith ball. source: http://en.wikipedia.org/wiki/Electroscope
When a negatively charged object touches a neutral object does the neutral object gain or lose electrons or protons?
It gains electrons. So if it gains electrons, then the neutral object becomes negatively charged as well.
How does A student puts a negatively charged object against a metal cabinet. Describe what happens to the charge on the object when it touches the metal cabinet?
Well the metal would obviously attract a charged particle for its charge less surface. The only possible way would be placing a positively charged object on the other side of the negative charged object such that it could counter effect the coulombian pull on the negative charge due to the metal. To keep the positive charge in place it would need to place it within oppositely charged electronic plates. This needs more amendments but thats another topic. When a charged object touches metal, the end result is usually what is known as a static shock.
