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Why is it important to touch a charged object to the metal rod of an electroscope and not to the rubber stopper?
Wiki User
∙ 12y ago
it is important because if you don't and touch the rubber stopper it will not show if it is positive.
Wiki User
∙ 12y ago
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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.
What would you use to see if somthing is charged?
an electroscope is used to determine whether an object is charged or not. However, it will not tell if the object is positively or negatively charged.
How does a gold leaf electroscope show that an object is charged?
You know that it is charged if the leaves rise.
What would happen if you touched a knob of positivly charged electroscope with another positivel charged object?
They repeal each other because they are each positively charged.
What makes an object positively or negatively charged?
Step one. Charge the electroscope by the induction method. A rod is used of opposite sign to that required on the electroscope . The rod is brought near to the cap so that the leaf diverges by the amount desired, and the electroscope is momentarily earthed by touching it with a finger. The rod is then removed, leaving the electroscope charged. (If the charged rod used is Benoite this leaves a positively charged electroscope, if a glass rod is used then the result is negatively charged electroscope) Step two Now use the object of unknown charge, A charge of the same kind as that on the electroscope will cause an increase while a charge of the opposite kind will cause a decrease in leaf divergence when the object is brought near to the electroscope. You must bring the object down from a good height, and move it slowly down towards the cap so any change in divergence will not be overlooked before the object becomes to close to the cap. Bringing the object down too quickly and too close to the cap could lead to a false reading. Source(s): A. F. Abott Ordinary Level Physics
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.
What devise can you use to see if something is charged?
It is an electroscope. If you lightly touch the object to the electroscope, it either sticks it together or pops it apart if it is charged.
What would you use to see if somthing is charged?
an electroscope is used to determine whether an object is charged or not. However, it will not tell if the object is positively or negatively charged.
How does a gold leaf electroscope show that an object is charged?
You know that it is charged if the leaves rise.
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.
What would happen if you touched a knob of positivly charged electroscope with another positivel charged object?
They repeal each other because they are each positively charged.
What type of instrument can detect the presence of an electrical charge?
a gold leaf electroscope. if initially charged negatively, the deflection of the leaf with respect to the electroscope is increased if a negatively charged object approaches the electroscope. conversely if a positively charged object approaches, the deflection is reduced. the angle of deflection is proportional to the magnitude of the charge.
What makes an object positively or negatively charged?
Step one. Charge the electroscope by the induction method. A rod is used of opposite sign to that required on the electroscope . The rod is brought near to the cap so that the leaf diverges by the amount desired, and the electroscope is momentarily earthed by touching it with a finger. The rod is then removed, leaving the electroscope charged. (If the charged rod used is Benoite this leaves a positively charged electroscope, if a glass rod is used then the result is negatively charged electroscope) Step two Now use the object of unknown charge, A charge of the same kind as that on the electroscope will cause an increase while a charge of the opposite kind will cause a decrease in leaf divergence when the object is brought near to the electroscope. You must bring the object down from a good height, and move it slowly down towards the cap so any change in divergence will not be overlooked before the object becomes to close to the cap. Bringing the object down too quickly and too close to the cap could lead to a false reading. Source(s): A. F. Abott Ordinary Level Physics
Uses of an electroscope?
An electroscope can be used to determine the charge of an object.
Must an object be electrically charged as well for it to be attracted by a charged object?
Provide your second object is an insulator, - able to carry an electrical charge - it will have an electrical charge induced on it by the presence of a nearby electrically charged object. So, the second object does not need to have its own independent electrical charge, it is sufficient that it can carry one.
How the charges on the body may be determined by using an electroscope?
when a substance is electrically charged it has either too few or too many electrons. when the electroscope is brought near a charged object the electrons 'jump' if the substance had too many electrons then the extras would 'jump' to the electroscope giving it a negative charge if the substance had too few electrons then the electrons from the electroscpe would 'jump' to the substance, giving the electroscope a positive charge
How do you use the gold leaf electroscope?
Touch an object to the metal receiver at the top of the electroscope. If the object is charged, it will transfer its charge to the electroscope. The receiver is connected to the gold leaf, so the electric charge from the object will spread throughout the metallic parts of the electroscope, including the suspended gold leaf. The two halves of the leaf then have the same type of charge on them. Since like charges repel, the leaves levitate away from each other at an angle dependent upon how much charge they hold.
