IIT JEE Class 12 11 Board CBSE
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👆𝙃𝙤𝙬 𝙩𝙤 𝘿𝙤𝙬𝙣𝙡𝙤𝙖𝙙👆
𝗧𝗵𝗲 𝐃𝗼𝘄𝗻𝗹𝗼𝗮𝗱 𝐏𝗿𝗼𝗰𝗲𝘀𝘀 𝗶𝘀 𝐕𝗲𝗿𝘆 𝐒𝗶𝗺𝗽𝗹𝗲 𝗶𝗳 𝐘𝗼𝘂 𝐖𝗮𝘁𝗰𝗵 𝐓𝗵𝗲 𝐅𝘂𝗹𝗹 𝐕𝗶𝗱𝗲𝗼. 👆👁️👆👁️🗨️👆👁️👆👁️🗨️👆
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✅ Atomic and Molecular Masses
➖Atomic Mass:
Mass of an atom.
Reported in atomic mass unit “amu” or unified mass “u”
One atomic mass unit i.e. amu, is the mass exactly equal to one-twelfth the mass of one carbon-12 atom.
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👇𝙃𝙤𝙬 𝙩𝙤 𝘿𝙤𝙬𝙣𝙡𝙤𝙖𝙙👇
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👇𝙃𝙤𝙬 𝙩𝙤 𝘿𝙤𝙬𝙣𝙡𝙤𝙖𝙙👇
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Electric Charges and Fields
1. Electric Charge Charge is the property associated with matter due to which it produces and experiences electric and magnetic effect.
2. Conductors and Insulators Those substances which readily allow the passage of electricity through them are called conductors, e.g. metals, the earth and those substances which offer high resistance to the passage of electricity are called insulators, e.g. plastic rod and nylon.
3. Transference of electrons is the cause of frictional electricity.
4. Additivity of Charges- Charge are scalars and they add up like real numbers. It means if a system consists of n charges q1, q2, q3 , … ,qn, then total charge of the system will be q1 +q2 + … +qn.
5. Conservation of Charge The total charge of an isolated system is always conserved, i.e. initial and final charge of the system will be same.
6. Quantisation of Charge -Charge exists in discrete amount rather than continuous value and hence, quantised.
Mathematically, charge on an object, q=±ne
where, n is an integer and e is electronic charge. When any physical quantity exists in discrete packets rather than in continuous amount, the quantity is said to be quantised. Hence, charge is quantised.
7. Units of Charge
(i) SI unit coulomb (C)
(ii) CGS system
(a) electrostatic unit, esu of charge or stat-coulomb (stat-C)
(b) electromagnetic unit, emu of charge or ab-C (ab-coulomb)
1 ab-C = 10 C, 1 C = 3 x 109 stat-C
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👇𝙃𝙤𝙬 𝙩𝙤 𝘿𝙤𝙬𝙣𝙡𝙤𝙖𝙙👇
STP. 1 - Scroll Down & Click on (I AM NOT A ROBOT)
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STP. 3 - Click on (Go To Link - Click Open)
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