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What kind of electroscope can be recognized as being charged just by observation?
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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 is only a gold leaf used in gold leaf electroscope?
Gold is a very good material for leaf-type electroscope. It is very soft and light and conductive, while being non-corrosive. Other materials can be used but none seem quite as good.
Why does a balloon fall off a wall after being statically charged?
Balloons fall off the wall after being charged because they soon run out of the charge they had through the air and the wall...
What was the significance of the particles that reflected back from the gold foil?
Hope you mean the famous alpha particle scattering experiment performed. Alpha particle being positively charged get reflected. This confirms that there have to be positively charged particles within the gold foil. Moreover this scattering is very less compared to those just passing through gold foil. Rutherford as he made an observation of these he came to the conclusion that the positively charged core is so tiny and its radius of the order of 10-14 m. The radius of the atom was already found to be 10-11 m. So it becomes clear that the nucleus is 1000 times smaller than the atomic size
How did Rutherford explain his observation?
he described it as being as tho firing a bullet of a gun forward only for it to turn around and head back the other way
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
What does direct observation do?
Observation changes the force being observed.
What happens with electrons when objects become positively or negatively charged?
The same thing happens for both, if the electroscope is positvely charged it attracts electrons to the top and sends protons to the leaves causing them to repel and visaversa with negative.
What is covert observation?
covert observation Participant observation carried out without the explicit awareness and agreement of the social unit being studied.
Why is only a gold leaf used in gold leaf electroscope?
Gold is a very good material for leaf-type electroscope. It is very soft and light and conductive, while being non-corrosive. Other materials can be used but none seem quite as good.
What does covert observation mean?
An observation in which participants do not know that they are being watched. Usually high in validity.
Does a mobile phone vibrate when being charged?
No it doesnt and wont vibrate when it is being charged.
What happens in a battery when being charged?
its getting charged!!
What can be charged without being touched?
solar panels can most definitely be charged without being touched!
What does covert observation mean in psychology?
covert observation sociology The researcher is taking part in the activity and the people don't know they are being observe like being undercover
Are you being charged for this?
I hope not
How do you differentiate observation from inference?
observation is observation! :)inference is inference! :)Assuming you meant "Differentiate observation from inference ?" !....Observation is the act of being able to physically see an object - inference is implying something is real without physical proof of its existence.Incidentally - why was this put into the category 'animal life' !
