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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
What else can I help you with?
Why a peace of paper attracted towards a charged object?
Most of the time, in an object, its negative and positive charges are balanced, which makes it a neutrally-charged object. Sometimes, when some objects come into contact with other things, they gather more charges of one type. If there are more electrons, they are negatively-charged. If there are more protons, they are positively-charged. Because opposites attract, an object which is negatively-charged will attract another object which is positively-charged and vice versa.
What is happening when you make an object charged?
When you make an object charged, you have either added or removed electrons from it. Adding electrons makes it negatively charged, and removing electrons makes it positively charged. Electrons move onto the object, giving it a static charge.
What makes most everyday objects electrically neutral?
Most everyday objects are electrically neutral because they contain an equal number of positively charged protons and negatively charged electrons. This balance of charges results in no overall electric charge on the object.
What makes a balloon stick to the wall?
A balloon can stick to a wall due to static electricity. When you rub the balloon against your hair or a wool cloth, it gains a negative charge. The negatively charged balloon is attracted to the neutral or positively charged wall, causing it to stick temporarily.
Is plasma heat?
Yes, plasma is a high-energy state of matter in which atoms are ionized. This means that the particles have separated into negatively charged electrons and positively charged ions. The high energy of plasma makes it an excellent conductor of electricity and can reach temperatures as hot as the surface of the sun.
If electrons are rubbed from cat's fur onto a rubber rod does the cats fur become positively or negatively charged?
Positively charged,because electrons are negatively charged and when you remove them only protons remain and those are positively charged,what makes the fur positively charged as well.
What happens to an object to make it positively charged?
An object becomes positively charged when it loses electrons. This can happen through processes such as friction, where electrons are transferred from one object to another, leaving one object with a positive charge.
What is the state of matter that has positively and negatively charged particles that makes up most of the universe?
plasma
Why a peace of paper attracted towards a charged object?
Most of the time, in an object, its negative and positive charges are balanced, which makes it a neutrally-charged object. Sometimes, when some objects come into contact with other things, they gather more charges of one type. If there are more electrons, they are negatively-charged. If there are more protons, they are positively-charged. Because opposites attract, an object which is negatively-charged will attract another object which is positively-charged and vice versa.
What is the meaning of statically charged?
To be statically charged means that an object has more of one type of particles than another. For example, if an object with more electrons than protons is negatively charged so we say that the object has built up a static charge.
What is happening when you make an object charged?
When you make an object charged, you have either added or removed electrons from it. Adding electrons makes it negatively charged, and removing electrons makes it positively charged. Electrons move onto the object, giving it a static charge.
How is a charge made (science)?
A charge is made by adding or removing electrons from an object. Electrons have a negative charge, so adding more electrons makes the object negatively charged, while removing electrons makes it positively charged. This process is known as charging by friction or induction.
Most of the mass of material tht makes up a plasma is .positively charged negatively charged same mass for each?
Under normal conditions, a gas is mainly made up of uncharged particles. That is, the individual gas atomsinclude equal numbers of protons (positively charged particles in the atom's nucleus) and electrons. The negatively charged electrons perfectly balance the positively charged protons, so the atom has a net charge of zero.
Is the center of an atom neutral?
The nucleus of an atom is positively charged. The electrons that orbit the nucleus are negatively charged to exactly the same degree, which makes the atom neutral.
Which part of an atom is positively charged and which part is negatively charged?
It is the nucleus of an atom that is positively charged. You'll recall that an atom is made up of protons, neutrons and electrons (hydrogen-1 excepted). And the protons and neutrons hang out in the nucleus, giving it an overall positive charge because the proton has a positive change.
Which particles are neutural?
Neutrons are neutral particles as they do not carry any electrical charge. This makes them unique compared to protons, which are positively charged, and electrons, which are negatively charged.
Is a free radical positively or negatively charged?
A radical may be positively, negatively orneutrallycharged.A radical is simply an atom or group of atoms that have one or more unpaired electrons.
