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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
Wiki User
∙ 11y ago
Wiki User
∙ 12y agoWhat makes the object positively or negatively charged is the amount of electrons to protons. Protons being positive, and electrons being negative. Which ever has more of one charge, it will take that charge. So if the object has more protons, it will be positive. If it has more electrons, the object will be negative.
Wiki User
∙ 12y agoIt depends on if it has more Electrons or Protons.
Protons are a positive charge and Electrons have a negative charge.
Neutrons have no charge at all.
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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.
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 in a magnet that makes it stick to metal?
The magnets both have very strong energy there for connecting boths magnitude
How does current electricity move?
In a conductive material, the atoms have a number of electrons which freely move back and forth from atom to atom. When an electric potential is applied across the conductor, more electrons start moving in from the negative end. The extra negative charge repels the electrons that are already in the conductor, so they start moving towards the 'positive' end. Electrons are negatively charged, and like charges repel each other. Because there are negatively charged particles (the electrons) moving from negative to positive, we conveniently say that 'current flows' from positive to negative (there are these imaginary positively charged particles), but this is just a concept which makes it easier to think about, and not actually how it works.
What makes a negative charge negative?
As I understand , there cannot be any standing alone, independent, souvereign negative or positive charge. If as a result of some work something get negatively charged or if a negative charge appeared somewhere, this means something get positively charged or a positive charge appeared somewhere too. Charge means potential energy and if this energy is then released during discharge a next work is produced, charges are neutralized, but the work has produced some other energy with its further possible (potential) work, and so on in the universe.
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 happens to an object to make it positively charged?
I think that a positively charged object can not attract one another
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.
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 is the state of matter that has positively and negatively charged particles that makes up most of the universe?
plasma
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.
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.
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.
What makes a water polar molecule?
The ends of the water molecule have opposite electrical charges
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.
What is an atom mostly?
Empty space makes up most of the atom which the negatively charged electrons use to orbit around the positively charged nucleus. The nucleus is made up of positively charged protons and neutral neutrons. The atom also has an electron cloud which is made up of, yes you guessed it, electrons
What is it that makes water such a good solvent for polar substances?
It's hydrogen side is partially positively charged, and its oxygen side is partially negatively charged. This allows it to dissolve soluble ionic compounds.
