COMEDK2025PhysicsElectrostaticsActual
The number of excess electrons found on an object when 1.6 C charge is given to that object is:
Options
- A10^8 electrons
- B10¹⁰ electrons
- C10¹⁹ electrons
- D10¹⁸ electrons
Correct answer
C. 10¹⁹ electrons
Step-by-step solution
The total charge Q on an object is quantized and given by the relation Q = ne , where n is the number of electrons and e is the elementary charge. Given Q = 1.6 C and e = 1.6 10⁻¹⁹ C. Substituting these values into the formula: n = Q e = 1.6 1.6 10⁻¹⁹ n = 1 10¹⁹ Therefore, the number of excess electrons is 10¹⁹ . Answer: 10¹⁹ electrons