1. What is Electron Charge?

The elementary charge, usually denoted by Q, is the electric charge carried by a single proton or, equivalently, the magnitude of the negative electric charge carried by a single electron. This value is a fundamental physical constant.

2. About the Fundamental Constant

The electron charge is defined as:

Where:

• \( Q \) — Elementary charge (coulombs)
• This value is exact and constant in nature
• It represents the smallest unit of electric charge that is observable

Note: This is a fundamental physical constant that does not require calculation but is provided for reference and educational purposes.

3. Importance in Physics

Details: The elementary charge is crucial in quantum mechanics, electromagnetism, and particle physics. It serves as the fundamental unit for all electrical charges in nature.

4. Using the Calculator

Tips: This calculator displays the fundamental constant value of electron charge. Simply click "Calculate" to see the precise numerical value.

5. Frequently Asked Questions (FAQ)

Q1: Why is electron charge considered fundamental?
A: It's the smallest observable unit of electric charge in nature, and all other charges are integer multiples of this value.

Q2: How was the electron charge determined?
A: Through Robert Millikan's oil drop experiment in 1909, which measured the charge of individual oil droplets.

Q3: Is the electron charge exactly 1.60217662 × 10⁻¹⁹ C?
A: This is the currently accepted value with high precision, though it may be refined with more advanced measurements.

Q4: Why is this value important in chemistry?
A: It's fundamental to understanding electrochemical reactions, ionization, and the behavior of atoms and molecules.

Q5: How does electron charge relate to electric current?
A: Electric current is the flow of electric charge, typically measured in amperes (1 A = 1 coulomb per second).