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CBSE Class 12-science Answered

what's static electricity?
Asked by champ9462114424 | 19 Apr, 2019, 12:25: PM
answered-by-expert Expert Answer
Static means not moving. Static electricity is an electrical charge that doesn't move.
 
All materials are made up of atoms. An atom is the smallest particle of a material .
In an idle state, the positive charge of the nucleus is equal to the sum of the negative charge of the electrons
moving around the same nucleus in atm,. Therefore the charge is neutral in materials.
If the nucleus loses or gains electrons, an imbalance is caused.
An atom that has lost one or more electrons then has a positive charge,
and an atom that has gained one or more electrons has a negative charge 

Static electricity is a surface phenomenon and is generated when two or more surfaces come into contact
with one another and are separated again. This causes a sort of splitting, or a transfer of negative electrons
from one atom to the other causing charge development at surface.Due to this charge accumulation , surface develops elctrical potential. 
 
Hence sparking, attraction of opposite charges  and repulsion of similar charges from other materials are occuring
Answered by Thiyagarajan K | 19 Apr, 2019, 03:04: PM

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CBSE 12-science - Physics
Electric sheilding 
Asked by divakar.9124 | 27 Apr, 2024, 10:42: PM
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CBSE 12-science - Physics
explain this concept
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CBSE 12-science - Physics
A dumbbell consists of two masses A and B each of mass m joined by a light rod of length l with mass B attached to a suspension point O by a light rod of length l as shown in figure. Find the minimum required speed with which mass A to be projected horizontally so that the system completes the vertical circular motion.
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CBSE 12-science - Physics
What is charge?
Asked by niharvijayvargiya5 | 23 Apr, 2024, 06:40: PM
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CBSE 12-science - Physics
please resolve with good explanation
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Asked by kulhariabhijeet | 21 Apr, 2024, 02:39: PM
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CBSE 12-science - Physics
what are ghost particles please answer how is that not able to interact with other subatomic particles ..?is that faster than photons?
Asked by mohapatraswetalina88 | 21 Apr, 2024, 12:18: PM
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CBSE 12-science - Physics
if breakdown voltage of each capacitor is 40v ,then maximum applied voltage Vmax will be
Asked by aishaisha091098 | 19 Apr, 2024, 04:54: PM
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CBSE 12-science - Physics
explain
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Asked by ranadeb8090 | 19 Apr, 2024, 03:32: PM
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CBSE 12-science - Physics
solve option e
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Asked by dasrituparna1999 | 13 Apr, 2024, 06:56: AM
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CBSE 12-science - Physics
The number of moles in an elemental sample is just the ratio of the mass m to atomic mass 4. n= A The number of protons N, in an elemental sample is Z (atomic number) times the number of moles of Avogadro's number NA N=ZnN P A Copper has an atomic mass of 63.5 g/mole and 29 protons per atom. If such an atom were neutral, then it would have as many protons as electrons. If you remove electrons from a neutral state, then you get a net positive charge. Given a 54 gram ball of copper with a net charge of 2.2 µC, what fraction of the copper's electrons have been removed?
Asked by dasrituparna1999 | 12 Apr, 2024, 09:26: PM
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