Answer: Solution: An electroscope is a device which helps us detect whether the body is charged or uncharged and detects the type of charge in the charged body, i.e. positive or negative charge.
What is a simple definition of electroscope?
Definition of electroscope : any of various instruments for detecting the presence of an electric charge on a body, for determining whether the charge is positive or negative, or for indicating and measuring intensity of radiation.
What is electroscope physics 8?
An electroscope is a scientific device that is used to detect the presence of an electric charge on a body. In the year 1600, British physician William Gilbert invented the first electroscope with a pivoted needle called versorium.
What is electroscope and how does it work?
What is an Electroscope? It is a device used to detect and measure electric charge on a body. When the charge is negative, the electrons in the metal travel through the rod and make the leaves move apart, indicating that it has electric charge.
What is the structure of electroscope?
Structure of Electroscope: It is made of a glass jar. A vertical brass rod is inserted into the jar through a cork. The top of the brass rod has a horizontal brass rod or a brass disc. Two gold leaves are suspended from the brass rod; inside the jar.
What are the three types of Electroscopes?
There are three classical types of electroscopes: pith-ball electroscope (first), gold-leaf electroscope (second), and needle electroscope (third).
What is a leaf electroscope Class 8?
Gold leaf electroscope has two gold leafs suspended from a metal(usually brass) stem in a vacuumed glass jar and connected to a metal cap. The glass is grounded with the help of a metal foil to make it uncharged. It can be used to: Detect charge: Body under test is touched with the metal cap.
What is an electroscope Class 7?
An electroscope is a scientific tool which helps in detecting the presence of an electric charge on a body.
Why is electroscope important?
An electroscope can be used to: Detect the presence of ionizing radiation or electric charge on a body. Identify and compare the magnitude of charges. Calculate the force between two charges.
What are the two types of electroscope?
The electroscope are of two types. (i) Pith ball electroscope. (ii) Gold leaf electroscope.
What are the two uses of electroscope?
used to detect the presence of electric charge on a body. It detects charge by the movement of a test object due to the Coulomb electrostatic force on it. The amount of charge on an object is proportional to its voltage.
Which wire is used in electroscope?
A copper wire (spiral one of the ends of the wire to make a large surface area); Some electrical tape, A plastic lid cut into a circle the same size as the jar opening (you can use the plastic lid from any plastic container);
Are electroscopes positive or negative?
The electroscope has a net neutral charge and the rubber rod has a net negative charge. If they are brought into contact, they will both take a net negative charge.
Which is the most commonly used electroscope?
So, the most common type of electroscope is gold leaf electroscope. Note: An electroscope is a scientific instrument that is used to detect the presence and magnitude of electric charge on a body.
What is the law of Coulomb?
Definition of Coulomb’s law : a statement in physics: the force of attraction or repulsion acting along a straight line between two electric charges is directly proportional to the product of the charges and inversely to the square of the distance between them.
What is the unit of electric charge?
coulomb, unit of electric charge in the metre-kilogram-second-ampere system, the basis of the SI system of physical units. It is abbreviated as C. The coulomb is defined as the quantity of electricity transported in one second by a current of one ampere.
Why gold-leaf is used in electroscope?
The reasons for using gold is that gold will not corrode and can be hammered to a very thin sheet, making the mass very small. This makes it more sensitive to smaller electric charges. Hence it is the ideal material to be used in an electroscope.
How do you make an electroscope Class 8?
Why does an electroscope move?
In the induction process of charging, a charged object is brought near to but not touching the electroscope. The presence of the charged object above the plate of the electroscope, induces electrons within the electroscope to move accordingly.
Is an electroscope a conductor?
Because the electroscope is made from conducting material, some of its electrons move up to the top of the electroscope to be near the charged rod when the rod is held close.
Which metal is used in electroscope?
Thus, brass is used as the material in the preparation of the stem of a gold-leaf electroscope.
What are the properties of electroscope?
The electroscope is an early scientific instrument used to detect the presence of electric charge on a body. It detects charge by the movement of a test object due to the Coulomb electrostatic force on it. The amount of charge on an object is proportional to its voltage.
Where is electroscope used?
An electroscope is a device that is used to detect the presence of an electric charge on a body.
How can electroscope be charged?
(h) To charge an electroscope by conduction, it must be touched by a charged body. (i) Like charges attract each other while unlike charges repel each other. Q. An uncharged electroscope can be charged by holding a charged body near its cap.
What happens when electroscope is charged?
When a positively charged electroscope is touched, electrons enter the electroscope from the ground. Being positively charged, the electroscope attracts some electrons from the conducting material (in this case, a person). The negatively charged electrons enter the electroscope and neutralize the positive charge.