A body has a charge of -2µC. If it has 2.5x10^13 protons, the how many electrons the body has?
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☆Atoms:
》Atoms are neutral because they have equal no. of electrons and protons, by which Net charge = 0.
☆Charge in object:
》object get charged by either losing or gaining electron.
- excess of electron - negatively charge.
- deficiency of electron- positively charged.
☆Solution:
• In the ques the object is negatively charged, so it has excess of electrons .
• So when the bòdy is neutral, it has electrons equal to protons,i.e, 2.5×10¹³.
• Now that it is charged it will have some extra more electrons, that has charge, Q = ne
• Total electrons = 2.5×10¹³ + ne
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》Total electrons = 2.5×10¹³ + 1.25×10¹³
• Total electrons = 3.75×10¹³
☆so, bòdy has 3.75×10¹³ no. of electrons.
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