COMEDK2023Morning ShiftPhysicsElectrostaticsActual
When 10¹⁹ electrons are removed from a neutral metal plate, the electric charge on it is
Options
- A+1.6 ~C
- B-1.6 ~C
- C10⁺¹⁹ ~C
- D10⁻¹⁹ ~C
Correct answer
A. +1.6 ~C
Step-by-step solution
The charge q on a body is given by the quantization formula q = ne , where n is the number of electrons removed or added and e is the elementary charge. Given n = 10¹⁹ and e = 1.6 10⁻¹⁹ C . Since electrons are removed from the neutral metal plate, the plate acquires a positive charge. q = + (10¹⁹) (1.6 10⁻¹⁹ C ) q = 1.6 10^ 19 - 19 C q = 1.6 10⁰ C = 1.6 C Answer: +1.6 ~C