Draw a labell diagram of gold leaf electroscope .what is the principal of its working?
Answers
The electroscope is a device used for detecting electric charge on an object.By using an electroscope we can tell whether an object is electrically charged or not.
Construction:
An electroscope consist of a large jar. A metal rod is fitted into the mouth of jar with the help of the cork. At the lower end of the metal rod a pair of thin leaves of gold or aluminum is suspended.
working:
Charge a glass rod by rubbing its one end with a piece of silk cloth. Touch the glass rod with the top end of metal clip with the positively glass rod, then some of its positive charge is transferred to the top end of metal clip. Now, since the metal clip is a good conductor of electricity., it conducts the positive charge to the gold leaves held on its other end. so, the Gold leaves having similar charges repel each other due to which they move apart.
Let us now, charge a plastic comb, with negative electric charge by rubbing it with dry hair. when the top end of metal clip of the electroscope is touched with the negatively charged plastic comb, even the aluminum leaves of electroscope diverge.
In this case , the gold leaves get negative charge and hence repel each other. This repulsion causes gold leaves to diverge.
From the above activity we can conclude that whether an object is positively charged or negatively charged , it will cause gold leaves to diverge when touched with the metal top of the electroscope.
Detection of charge:
1. If on touching the metal top of electroscope with the given object, the gold leaves of electroscope will diverge, then the given object has electrical charge on it.
2. If on touching the metal top of electroscope with the given object, the gold leaves of electroscope will not diverge, then the given object has no electrical charge on it.
The electroscope is a device used for detecting electric charge on an object.By using an electroscope we can tell whether an object is electrically charged or not.
Construction:
An electroscope consist of a large jar. A metal rod is fitted into the mouth of jar with the help of the cork. At the lower end of the metal rod a pair of thin leaves of gold or aluminum is suspended.
working:
Charge a glass rod by rubbing its one end with a piece of silk cloth. Touch the glass rod with the top end of metal clip with the positively glass rod, then some of its positive charge is transferred to the top end of metal clip. Now, since the metal clip is a good conductor of electricity., it conducts the positive charge to the gold leaves held on its other end. so, the Gold leaves having similar charges repel each other due to which they move apart.
Let us now, charge a plastic comb, with negative electric charge by rubbing it with dry hair. when the top end of metal clip of the electroscope is touched with the negatively charged plastic comb, even the aluminum leaves of electroscope diverge.
In this case , the gold leaves get negative charge and hence repel each other. This repulsion causes gold leaves to diverge.
From the above activity we can conclude that whether an object is positively charged or negatively charged , it will cause gold leaves to diverge when touched with the metal top of the electroscope.
Detection of charge:
1. If on touching the metal top of electroscope with the given object, the gold leaves of electroscope will diverge, then the given object has electrical charge on it.
2. If on touching the metal top of electroscope with the given object, the gold leaves of electroscope will not diverge, then the given object has no electrical charge on it.