1 Coulomb of charge is equal to how many electrons?

Electric charge is one of the fundamental properties of matter that causes it to experience a force when placed in an electromagnetic field. The Coulomb (C) is the SI unit of electric charge, named after the French physicist Charles-Augustin de Coulomb. It represents the amount of charge transferred by a current of one ampere in one second.

Each electron carries a negative charge of approximately 1.6 × 10⁻¹⁹ Coulomb (C). This means that if we want to know how many electrons make up one Coulomb of charge, we divide the total charge (1 C) by the charge of a single electron:

Number of electrons=1 C1.6×10−19 C/electron\text{Number of electrons} = \frac{1\ \text{C}}{1.6 \times 10^{-19}\ \text{C/electron}}Number of electrons=1.6×10−19 C/electron1 C Number of electrons=6.25×1018 electrons\text{Number of electrons} = 6.25 \times 10^{18}\ \text{electrons}Number of electrons=6.25×1018 electrons

This tells us that 1 Coulomb of charge corresponds to the charge carried by approximately 6.25 × 10¹⁸ electrons. In other words, if 6.25 × 10¹⁸ electrons move through a wire or conductor, they transfer one Coulomb of electric charge.

This concept is extremely important in Electrostatics and Electric Current calculations. For instance:

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  The current (I) is defined as the rate of flow of charge, I=QtI = \frac{Q}{t}I=tQ.

  
  


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  If 1 Coulomb of charge passes through a point in a circuit per second, the current is 1 Ampere.

  
  

Understanding how many electrons make up a Coulomb helps in visualizing how large this unit is — it represents the movement of trillions of tiny particles!

Thus, the correct answer is B) 6.25 × 10¹⁸ electrons.