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When a body is positively charged, consider the following statement:

a) Its atomic number increases

b) Its mass increases

c) Its mass decreases

Which of the above statement is/are correct?


1. Only a is correct
2. Only b is correct
3. Only c is correct
4. Both a and c are correct

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Correct Answer - Option 3 : Only c is correct

CONCEPT:

Electric Charge

  • It is defined as the intrinsic property of certain fundamental particles like electrons, proton, etc, due to which they produce electric and magnetic effects.
  • Types of electric charge
    1. ​Positive charge: A body having a deficiency of electrons.
    2. ​Negative charge: A body having an excess of electrons.
  • Properties of electric charge
    • Like charges repel and unlike charges attract each other.
    • A charge is a scalar quantity.
    • A charge is always quantized.
    • A charge will always remain conserved.
    • A charge is always associated with mass.
    • The unit of charge is the coulomb.

⇒ 1 coulomb= charge on 625 × 1016 electrons

EXPLANATION:

  • To positively charged a body we need to take out some electrons from the body.
  • So to charge a body with a positive charge the number of protons will not change, so the atomic number does not change.
  • A charge is always associated with mass.
  • Since to create a positive charge, some electrons are taken out from the body so its mass will decrease.
  • So only statement c is correct. Hence, option 3 is correct.

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